Combat marksmanship is essential to all Soldiers-not only to acquire the expert skills necessary for survival on the battlefield, but, because it enforces teamwork and discipline. In every organization, all members must continue to practice certain skills to remain proficient. Marksmanship is paramount.
This chapter discusses several aspects of combat marksmanship, including safety, administrative, weapons,
This paragraph describes procedures and requirements for handling all organic and special weapons. These procedures are designed to prevent safety-related accidents and fratricide. They are intended for use in both training and combat, and apply to all assigned weapons of a unit. In all cases, strict self-discipline is the most critical factor for the safe handling of weapons. The procedures for weapons handling may vary based on METT-TC, but the following procedures are generally recommended:
- As soon as you are issued a weapon, immediately clear it, and place it on safe IAW the appropriate Soldier’s or operator’s manual.
- Keep the weapon on safe, except–
–When it is stored in an arms room.
–Immediately before target engagement.
–When directed by the chain of command.
- At all times, handle weapons as if they are loaded.
- Never point a weapon at anyone, unless a life-threatening situation justifies the use of deadly force.
- Always know where you are pointing the muzzle of the weapon.
- Always know if the weapon is loaded.
- Always know if the weapon is on safe.
- Insert magazines or belts of ammunition only on the direction of your chain of command.
Note: The chain of command determines when to load the weapon and chamber a round in reference to METT-TC in a combat environment. Generally, weapons remain on safe until ready to fire.
10-1. Administrative procedures include weapons clearing, grounding of weapons, and aircraft and vehicle movement. Soldiers must know how to handle their weapons and have a clear understanding of fire control.
ADMINISTRATIVE WEAPONS CLEARING
10-2. Administrative weapons clearing is performed following the completion of the tactical phase of all live fires and range qualifications, or upon reentry of a secure area in combat. Magazines or belts are removed from all weapons. The chain of command inspects all chambers visually, using red filtered light if at night, and verifies that each weapon and magazine is clear of ammunition. Weapons should also be rodded. Magazines are not reinserted into weapons.
GROUNDING OF WEAPONS
10-3. If grounded with equipment, all weapons are placed on SAFE and arranged off the ground with the open chamber visible, if applicable. Bipod-mounted weapons are grounded on bipods with all muzzles facing downrange and away from nearby Soldiers.
AIRCRAFT AND VEHICLE MOVEMENT
10-4. Weapons should always be cleared and on SAFE when conducting movement in aircraft and vehicles, unless leaders issue specific instructions to do otherwise. Keep weapon muzzles pointed downward when traveling on aircraft. Weapons are locked and loaded only after exiting the aircraft or vehicle, or upon command of the leader.
Note: Take extra care to correctly handle the pistol, especially the M9 with its double action (fire from the hammer down) feature. Removing the pistol from the holster can accidentally move the safety lever to fire, permitting immediate double action mode of fire. Only chamber a round in a pistol when a specific threat warrants doing so.
10-5. Weapons include the M9 pistol; M16-series rifles; M4 carbine rifles; M203 grenade launcher; M249 squad automatic weapon (SAW); M240B machine gun; M2 .50 caliber machine gun; MK 19 grenade machine gun, Mod 3; improved M72 light antiarmor weapon; M136 AT4; M141 bunker defeat munition (BDM); and Javelin shoulder-fired munition:
10-6. A lightweight, semiautomatic, single-action/double-action pistol can be unloaded without activating the trigger while the safety is in the “on” position (Figure 10-1). The M9 has a 15-round staggered magazine. The reversible magazine release button that can be positioned for either right-or left-handed shooters. This gun may be fired without a magazine inserted. The M9 is only authorized for 9-mm ball or dummy ammunition that is manufactured to US and NATO specifications. On this weapon, the hammer may be lowered from the cocked, “ready-to-fire” position to the uncocked position without activating the trigger. This is done by placing the thumb safety “ON.”
Figure 10-1. M9 pistol.
Caliber – 9 mm
Weight Unloaded – 2.1 lb
Fully loaded – 2.6 lb
Maximum effective range – 50 meters
10-7. A lightweight, air-cooled, gas-operated, magazine-fed rifle designed for either burst or semiautomatic fire through use of a selector lever. There are three models:
10-8. The M16A2 incorporates improvements in iron sight, pistol grip, stock, and overall combat effectiveness (Figure 10-2). Accuracy is enhanced by an improved muzzle compensator, a three-round burst control, and a heavier barrel; and by using the heavier NATO-standard ammunition, which is also fired by the squad automatic weapon (SAW).
Figure 10-2. M16A2 rifle.
Caliber – 5.56 mm
Weight- 8.8 lb (with sling and one loaded magazine)
Maximum effective range
Rate of fire Semiautomatic – 45 rounds per min
10-9. The M16A3 is identical to the M16A2, except the A3 has a removable carrying handle mounted on a picatinny rail (for better mounting of optics).
10-10. The M16A4 is identical to the M16A3, except for the removable carrying handle mounted on a picatinny rail. It has a maximum effective range of 600 meters for area targets. Like the M4-series weapons, the M16-series rifles use ball, tracer, dummy, blank, and short-range training ammunition (SRTA) manufactured to US and NATO specifications.
10-11. The M4 is a compact version of the M16A2 rifle, with collapsible stock, flat-top upper receiver accessory rail, and detachable handle/rear aperture site assembly (Figure 10-3). This rifle enables a Soldier operating in close quarters to engage targets at extended ranges with accurate, lethal fire. It achieves more than 85 percent commonality with the M16A2 rifle.
Figure 10-3. M4 carbine.
Caliber – 5.56 mm
Weight – 7.5 lb (loaded weight with sling and one magazine)
Maximum effective range Area target – 600 meters
Rate of fire Semiautomatic – 45 rounds per minute
M203 GRENADE LAUNCHER
10-12. The M203A1 grenade launcher is a single-shot weapon designed for use with the M4 series carbine. It fires a 40-mm grenade (Figure 10-4). Both have a leaf sight and quadrant sight. The M203 fires high-explosive (HE), high-explosive dual-purpose (HEDP) round, buckshot, illumination, signal, CS (riot control), and training practice (TP) ammunition. Two M203s are issued per Infantry squad.
Figure 10-4. M203 grenade launcher.
Caliber – .40 mm
Weight – .3.0 lb (empty) 3.6 lb (loaded)
Maximum effective range Area target – 350 meters
Rate of fire – 5 to 7 rounds per minute
M249 SQUAD AUTOMATIC WEAPON
10-13. A lightweight, gas-operated, air-cooled belt or magazine-fed, one-man-portable automatic weapon that fires from the open-bolt position (Figure 10-5). This gun can be fired from the shoulder, hip, or underarm position; from the bipod-steadied position; or from the tripod-mounted position. Two M249s are issued per Infantry squad.
Figure 10-5. M249 squad automatic weapon (SAW).
Caliber – 5.56 mm
Weight – 16.5 lb
Maximum effective range Area target
Rate of fire
Sustained – 100 rounds per min 6- to 9-round bursts 4 to 5 seconds between bursts
Rapid – 200 rounds per minute 6- to 9-round bursts 2 to 3 seconds between bursts
Cyclic – 650 to 850 rounds per minute Continuous burst
M240B MACHINE GUN
10-14. A medium, belt-fed, air-cooled, gas-operated, crew-served, fully automatic weapon that fires from the open bolt position (Figure 10-6). Ammunition is fed into the weapon from a 100-round bandoleer containing ball and tracer (4:1 mix) ammunition with disintegrating metallic split-link belt. Other types of ammunition available include armor-piercing, blank, and dummy rounds. It can be mounted on a bipod, tripod, aircraft, or vehicle. A spare barrel is issued with each M240B, and barrels can be changed quickly as the weapon has a fixed head space. It is being issued to Infantry, armor, combat engineer, special force/rangers, and selected field artillery units that require medium support fires.
Figure 10-6. M240B machine gun.
Caliber – 7.62 mm
Weight – 27.6 lb
Maximum effective range Area target
Rate of fire
Sustained – 100 rounds per minute 6- to 9-round bursts 4 to 5 seconds between bursts
Rapid – 200 rounds per minute 10- to 13-round bursts 2 to 3 seconds between bursts
Cyclic – 650 to 950 rounds per minute Continuous bursts
M2 (.50 CALIBER) MACHINE GUN
10-15. A heavy (barrel), recoil operated, air-cooled, crew-served, and transportable fully automatic weapon with adjustable headspace (Figure 10-7). A disintegrating metallic link belt is used to feed the ammunition into the weapon. This gun may be mounted on ground mounts and most vehicles as an antipersonnel and antiaircraft/light armor weapon. The gun is equipped with leaf-type rear sight, flash suppressor and a spare barrel assembly. Associated components are the M63 antiaircraft mount and the M3 tripod mount.
Figure 10-7. M2 .50 caliber machine gun with M3 tripod mount.
|Caliber – .50
Ammunition – 12.7 x 99-mm
NATO Weight – 84 lb (44 lb for tripod)
Maximum effective range Antiaircraft mount -1,400 meters
Tripod mount – 2,000 meters
Rate of fire Cyclic – 400 to 500 rounds per minute
MK 19 GRENADE MACHINE GUN, MOD 3
10-16. A self-powered, air-cooled, belt-fed, blowback-operated weapon designed to deliver decisive firepower against enemy personnel and lightly armored vehicles (Figure 10-8). A disintegrating metallic link belt feeds either HE or HEDP ammunition through the left side of the weapon. It replaces the M2 heavy machine guns in selected units, and will be the main suppressive weapon for combat support and combat service support units. The MK 19 Mod 3 can be mounted on the HMMWV M113 family of vehicles, on 5-ton trucks, and on some M88A1 recovery vehicles.
Figure 10-8. MK 19 grenade machine gun, Mod 3.
Caliber – 40 mm
Weight – 72.5 lb
Maximum effective range
Rate of fire
Cyclic – 325 to 375 rounds per minute
IMPROVED M72 LIGHT ANTIARMOR WEAPON
10-17. A compact, lightweight, single shot, and disposable weapon with a family of warheads optimized to defeat lightly armored vehicles and other hard targets at close-combat ranges (Figure 10-9). Issued as a round of ammunition, it requires no maintenance. The improved M72 light antiarmor weapon systems offer significantly enhanced capability beyond that of the combat-proven M72A3. The improved M72 light antiarmor weapon system consists of an unguided high-explosive antiarmor rocket prepackaged in a telescoping, throw-away launcher. The system performance improvements include a higher velocity rocket motor that extends the weapon effective range, increased lethality warheads, lower more consistent trigger release force, rifle type sight system, and better overall system reliability and safety. The improved M72 is transportable by tactical wheeled and tracked vehicles, without any safety constraints, and is air deliverable by individual parachutist or by pallet.
10-18. The M136 AT4 is a lightweight, self-contained antiarmor weapon (Figure 10-10). It is man-portable and fires (only) from the right shoulder. The M136 AT4 is used primarily by Infantry forces to engage and defeat armor threats. The weapon accurately delivers a high-explosive antitank (HEAT) warhead with excellent penetration capability (more than 15 inches of homogenous armor) and lethal after-armor effects. The weapon has a free-flight, fin-stabilized, rocket-type cartridge packed in an expendable, one-piece, fiberglass-wrapped tube.
Note: Both the high penetration (HP) and reduced sensitivity (RS) versions of the AT4 Confined Space (CS) weapon offer improved safety. Unlike the original AT4, these models can be fired safely from within a room or other protected enclosure. They also have much less backblast and launch signature. Both the AT4 CS-HP and CS-RS consist of shock resistant, fiberglass-reinforced launching tubes fitted with firing mechanisms, popup sights, carrying slings, protective covers, and bumpers.
M141 BUNKER DEFEAT MUNITION
10-19. A lightweight, self-contained, man-portable, high-explosive, disposable, shoulder-launched, multipurpose assault weapon-disposable (SMAW-D) that contains all gunner features and controls necessary to aim, fire, and engage targets (Figure 10-11). It can defeat fortified positions (bunkers) made of earth and timber; urban structures; and lightly armored vehicles. The M141 BDM is issued as an 83-mm, high-explosive, dual-mode, assault rocket round. It requires no maintenance. It fires (only) from the right shoulder. The weapon system structure consists of inner and outer filament-woven composite tubes, stored one inside the other to reduce carry length. Unlike the M136 AT4 launcher, the M141 BDM must be extended before firing.
10-20. The Javelin is the first fire-and-forget, crew-served antitank missile (Figure 10-12). Its fire-and-forget guidance mode enables gunners to fire and then immediately take cover. This greatly increases survivability. The Javelin’s two major components are a reusable command launch unit (CLU) and a missile sealed in a disposable launch tube assembly. The CLU’s integrated daysight/nightsight allows target engagements in adverse weather and in countermeasure environments. The CLU may also be used by itself for battlefield surveillance and reconnaissance. Special features include a selectable top-attack or direct-fire mode (for targets under cover or for use in urban terrain against bunkers and buildings), target lock-on before launch, and a very limited backblast. These features allow gunners to fire safely from within enclosures and covered fighting positions. The Javelin can also be installed on tracked, wheeled, or amphibious vehicles.
Figure 10-12. Javelin.
Caliber – 126 mm
Weight (missile+CLU) – 49.5 lb
Maximum effective range – 2,000 meters (direct and top-attack)
Minimum effective engagement range
10-21. Fire control includes all actions in planning, preparing, and applying fire on a target. Your leader selects and designates targets. He also designates the midpoint and flanks or ends of a target, unless they are obvious for you to identify. When firing, you should continue to fire until the target is neutralized or until signaled to do otherwise by your leader. The noise and confusion of battle will limit the use of some methods of control, so he will use the method, or combination of methods, that does the job.
WAYS TO COMMUNICATE FIRE CONTROL
10-22. The following paragraphs discuss methods to correspond fire control.
10-23. This includes both voice and devices such as whistles. Sound signals are good only for short distances. Their range and reliability are reduced by battle noise, weather, terrain, and vegetation. Voice communications may come directly from your leader to you or they may be passed from Soldier-to-Soldier.
10-24. This method is prearranged fire; your leader tells you to start firing once the enemy reaches a certain point or terrain feature. When using this method of fire control, you do not have to wait for an order to start firing. Prearranged fire can also be cued to friendly actions.
10-25. In this method, your leader gives a prearranged signal when he wants you to begin, shift, and cease firing. This can be either a visual signal or a sound signal. Start firing immediately when you get the signal.
10-26. You may be instructed to begin, shift, and cease firing at a set time. Additionally, Soldier-initiated fire is used when there is no time to wait for orders from your leader.
Standing Operating Procedure
10-27. Using an SOP can reduce the number of oral orders needed to control fire. However, everyone in the unit must know and understand the SOP for it to work. Three widely used SOP formats are the search-fire-check, return-fire, and rate-of-fire SOPs. Procedures for issuing fire commands for direct fire weapons should also be covered in an SOP.
- Search your assigned sectors for enemy targets.
- Fire at any targets (appropriate for your weapon) seen in your sectors.
- While firing in your sectors, visually check with your leader for specific orders.
10-28. This SOP tells each Soldier in a unit what to do in case the unit makes unexpected contact with the enemy (in an ambush, for example).
10-29. This SOP tells each Soldier how fast to fire at the enemy. The rate of fire varies among weapons, but the principle is to fire at a maximum rate when first engaging a target and then slow the rate to a point that will keep the target suppressed. This helps to keep weapons from running out of ammunition.
THREAT-BASED FIRE CONTROL MEASURES
10-30. The following paragraphs discuss threat-based fire control measures:
10-31. Engagement priorities are the target types, identified by your leader, that offer the greatest payoff or present the greatest threat. He then establishes these as a unit engagement priority. Your leader refines these priorities within your unit, such as employing the best weapons for targets, as well as fire distribution.
10-32. Range selection is a means by which your leader will use their estimate of the situation to specify the range and ammunition for the engagement. Range selection is dependent on the anticipated engagement range. Terrain, visibility, weather, and light conditions affect range selection, and the amount and type of ammunition.
Weapons Control Status
10-33. The three levels of weapons control status outline the conditions, based on target identification criteria, under which friendly elements may engage. Your leader will set and adjust the weapons control status based on the friendly and enemy situation, and the clarity of the situation. The three levels, in descending order of restriction, follow:
WEAPONS HOLD Engage only if engaged or ordered to engage.
WEAPONS TIGHT Only engage targets that are positively identified as enemy.
WEAPONS FREE Engage any targets that are not positively identified as friendly.
Rules of Engagement
10-34. ROE are the commander’s rules for use of force and specify the circumstances and limitations in which you may use your weapon. They include definitions of combatant and noncombatant elements, and prescribe the treatment of noncombatants. Factors influencing ROE are national command policy, the mission, operational environment, and the law of war.
10-35. Combat readiness makes it essential for you to zero your individual weapon whenever it is issued. Additionally, each rifle in the unit arms room, even if unassigned, should be zeroed by the last Soldier it was assigned to. For more detailed information see FM 3-22.9.
Note: Only the M16/M4-series weapons will be discussed for zeroing procedures and aided-vision device combinations. For other weapons such as M249 SAW and the M240B, see the appropriate FMs.
10-36. Mechanical zero is the process of alignment of the weapons sighting systems to a common start point. Conduct the following procedures for these specific weapons:
10-37. Numbers in parentheses refer to the callouts in Figure 10-13.
- Adjust the front sight post (1) up or down until the base of the front sight post is flush with the front sight post housing (2).
- Adjust the elevation knob (3) counterclockwise, as viewed from above, until the rear sight assembly (4) rests flush with the carrying handle and the 8/3 marking is aligned with the index line on the left side of the carrying handle.
- Position the apertures (5) so the unmarked aperture is up and the 0 to 200 meter aperture is down. Rotate the windage knob (6) to align the index mark on the 0 to 200 meter aperture with the long center index line on the rear sight assembly.
M16A4 AND M4 CARBINE
10-38. Numbers in parentheses refer to the callouts in Figure 10-14.
- Adjust the front sight post (1) up or down until the base of the front sight post is flush with the front sight post housing (2).
- Adjust the elevation knob (3) counterclockwise, when viewed from above, until the rear sight assembly (4) rests flush with the detachable carrying handle and the 6/3 marking is aligned with the index line (5) on the left side of the carrying handle.
- Position the apertures (6) so the unmarked aperture is up and the 0 to 200 meter aperture is down. Rotate the windage knob (7) to align the index mark (8) on the 0 to 200 meter aperture with the long center index line on the rear sight assembly.
10-39. Battlesight zero is the alignment of the sights with the weapon’s barrel given standard issue ammunition. It provides the highest probability of hitting most high-priority combat targets with minimum adjustment to the aiming point 300 meter sight setting as on the M16A2/3/4 and M4 series weapons. For each of the following weapons, ensure the rear sights are set for battlesight zero (25-meter zero):
10-40. Numbers in parentheses refer to the callouts in Figure 10-15.
- Adjust the elevation knob (1) counterclockwise, as viewed from above, until the rear sight assembly (2) rests flush with the carrying handle and the 8/3 marking is aligned with the index line (3) on the left side of the carrying handle. Then, turn the elevation knob one more click clockwise.
- Position the apertures (4) so the unmarked aperture is up and the 0 to 200 meter aperture is down. Rotate the windage knob (5) to align the index mark on the 0 to 200 meter aperture with the long center index line on the rear sight assembly.
10-41. Numbers in parentheses refer to the callouts in Figure 10-16.
- Adjust the elevation knob (1) counterclockwise, when viewed from above, until the rear sight assembly (2) rests flush with the detachable carrying handle and the 6/3 marking is aligned with the index line (3) on the left side of the detachable carrying handle. To finish the procedure, adjust the elevation knob two clicks clockwise so the index line on the left side of the detachable carrying handle is aligned with the “Z” on the elevation knob.
- Position the apertures (4) so the unmarked aperture is up and the 0 to 200 meter aperture is down. Rotate the windage knob (5) to align the index mark on the 0 to 200 meter aperture with the long center index line (6) on the rear sight assembly.
10-42. Numbers in parentheses refer to the callouts in Figure 10-17.
- Adjust the elevation knob (1) counterclockwise, when viewed from above, until the rear sight assembly (2) rests flush with the detachable carrying handle and the 6/3 marking is aligned with the index line (3) on the left side of the detachable carrying handle. The elevation knob remains flush.
- Position the apertures (4) so the unmarked aperture is up and the 0 to 200 meter aperture is down. Rotate the windage knob (5) to align the index mark (6) on the 0 to 200 meter aperture with the long center index line on the rear sight assembly.
10-43. To ensure proper and accurate shot group marking–
- Apply the four fundamentals of marksmanship deliberately and consistently. Establish a steady position allowing observation of the target. Aim the rifle at the target by aligning the sight system, and fire your rifle without disturbing this alignment by improper breathing or during trigger squeeze.
- Initially, you should fire two individual shot groups before you consider changing the sight. Fire each shot at the same aiming point (center mass of the target) from a supported firing position. You will fire a three-round shot group at the 25-meter zero target.
- You will triangulate each shot group and put the number “1” in the center of the first shot group and a number “2” on the second. Group the two shot groups and mark the center of the two shot groups with an X. If the two shot groups fall within a 4-centimeter circle then determine what sight adjustments need to be made, then identify the closest horizontal and vertical lines to the X, and then read the 25-meter zero target to determine the proper sight adjustments to make. A proper zero is achieved if five out of six rounds fall within the 4-centimeter circle (Figure 10-18).
Note: The M16A2 zero target squares are .96 centimeter in size while the M4 zero target squares are 1.3 centimeters in size. Two single shots on a 25-meter zero target that are 2 centimeters apart does not equate to two squares from each other on the M4 zero target.
10-44. The borelight is an accurate means of zeroing weapons and most aided-vision equipment without the use of ammunition. Time and effort must be applied to ensure a precise boresight, which will in turn save time and ammunition. Both the M16A2 and the M4/MWS can be zeroed using the borelight and each of the following five aided vision devices:
- Backup iron sight (which can also be boresighted).
- M68 CCO.
Note: Precisely boresighting a laser allows direct engagement of targets without a 25-meter zero. If a borelight is unavailable, you must use a 25-meter zero to zero the device. All optics must be 25-meter zeroed. A borelight only aids in zeroing.
1. DO NOT STARE INTO THE VISIBLE LASER BEAM.
2. DO NOT LOOK INTO THE VISIBLE LASER BEAM THROUGH BINOCULARS OR TELESCOPES.
3. DO NOT POINT THE VISIBLE LASER BEAM AT BEAM THROUGH BINOCULARS OR TELESCOPES.
4. DO NOT SHINE THE VISIBLE LASER BEAM INTO OTHER INDIVIDUAL’S EYES.
- Make sure the weapon is CLEAR and on SAFE before using the borelight.
- Ensure the bolt is locked in the forward position.
- When rotating the borelight to zero it, ensure the mandrel is turning counter clockwise (from the gunners point of view) to avoid loosening the borelight from the mandrel.
10-45. Boresighting is a simple procedure if the steps are strictly followed. The visible laser of the borelight must be aligned with the barrel of your assigned weapon. Then, using a 10-meter boresight target, the weapon can be boresighted with any optic, laser, or iron sight.
10-46. Before you boresight your weapon, the borelight must first be zeroed to the weapon. To zero the borelight to the weapon, align the visible laser with the barrel of the weapon. Stabilizing the weapon is crucial. The weapon can be stabilized in a rifle box rest or in a field location by laying two rucksacks side by side. Lay the weapon on the rucksacks and then lay another rucksack on top of the weapon to stabilize it.
ZEROING THE BORELIGHT
Avoid overadjusting the laser or pointing it at other Soldiers or reflective material.
10-47. The weapon need not be perfectly level with the ground during boresighting Conduct the following steps to zero the borelight:
- Attach the 5.56-mm mandrel to the borelight.
- Insert the mandrel into the muzzle of the weapon. The borelight is seated properly when the mandrel cannot be moved any further into the muzzle and the mandrel spins freely. Stabilize the weapon so it will not move.
- Measure 10 meters with the 10-meter cord that comes with the borelight or pace off eleven paces.
- The zeroing mark is a small dot drawn on a piece of paper, tree bark, or the borelight RP on the 10-meter boresight target (Figure 10-19).
- Rotate the borelight until the battery compartment is facing upward and the adjusters are on the bottom (Figure 10-20). This position of the borelight, and where the visible laser is pointing, is the start point.
- Rotate the borelight until the battery compartment is down and the adjusters are on top to allow for easy access to the adjusters (Figure 10-21). This position of the borelight, and where the visible laser is pointing, is identified as the half-turn position.
Note: Use the commands START POINT and HALF TURN to ensure clear communication between you and your buddy/assistant at the boresight target.
7. The RP is about halfway between the start point and the half-turn point (Figure 10-22).
- Turn the borelight on and spin it until it is in the start point position. Place the zeroing mark about 10 meters from the end of the barrel so that the visible laser strikes the zeroing mark.
- Slowly rotate the borelight 180 degrees while watching the visible laser made by the
- borelight. If the visible laser stops on the zeroing mark, the borelight is zeroed to the
- If the borelight does not stop on the zeroing mark, elevation and windage adjustments must be made to the borelight.
- From the start point, realign the zeroing mark with the visible laser, rotate the borelight 180 degrees to the half-turn position, and identify the RP. Using the adjusters on the borelight, move the visible laser to the RP. Rotate the borelight back to the start point; move the zeroing mark to the visible laser. If the visible laser cannot be located when you spin the borelight to the half-turn position, start this procedure at 2 meters instead of 10 meters. When the visible laser is adjusted to the RP at 2 meters, then start the procedure again at 10 meters.
- Repeat Step 11 above until the visible laser spins on itself.
Note: Every barrel is different; therefore, steps (8) through (10) must be performed with every weapon to ensure that the borelight is zeroed to that barrel. If the borelight is zeroed, then go directly to the boresighting procedures.
10-48. During boresighting, your weapon should be in the “bolt forward” position and must not be canted left or right. As a firer, you will need a target holder in order to properly boresight a weapon. The duties follow:
- The firer’s primary duty is to zero the borelight and make all adjustments on the aided-vision device being used.
- The target holder secures the 10-meter, (1-centimeter square grid) boresight target (Figure 10-23) straight up and down 10 meters from the borelight, and directs the firer in making necessary adjustments to the aiming device. The target holder must wear NVGs when boresighting IR aiming lasers.
BORESIGHTING THE BACKUP IRON SIGHT
10-49. The backup iron sight (BIS) can be boresighted to a new user to expedite 25-meter zeroing (Figure 10-24). To boresight using the BIS, align the iron sights with the (Canadian bull) on the 10-meter boresight target. Adjust the windage and elevation of the iron sights until the borelight is centered with the circle on the boresight target.
10-50. The BIS is adjusted for a 300-meter battlefield zero to provide backup in the event an optic or laser device fails to function. The BIS is zeroed on the M4/M4A1 target on the backside of the M16A2 zero targets. The 25-meter zeroing procedures are the same as for conventional rear sight assembly on the M16-/M4-series weapons.
BORESIGHTING THE M68 CLOSE COMBAT OPTIC
10-51. The M68 CCO is a reflex (nontelescopic) sight (Figure 10-25). It uses a red-aiming reference (collimated dot) and is designed for the sighting with both eyes open. Position your head so that one eye can focus on the red dot and the other eye can scan downrange. Place the red dot on the center of mass of the target and engage. With your nonfiring eye closed, look through the M68 to ensure you can see the red dot clearly. Place the red dot center mass of the target, and then engage. If you zero your weapon with the one-eye-open method, then you must engage targets using this method for zero accuracy. The dot follows the horizontal and vertical movement of your eye while remaining fixed on the target. No centering or focusing is required. The more accurately you boresight the M68 to your weapon, the closer it will be to a battlesight zero.
25-Meter Zero Procedure with Borelight
- Select the proper 10-meter boresight target for your weapon and M68 configuration. With the help of an assistant, place the boresight target 10 meters in front of the weapon.
- Turn the M68 to the desired setting (position number 4). Assume a stable supported firing position behind your weapon, and look through the M68. Aim the red dot of the M68 on the crosshair of the 10-meter boresight target. Adjust the M68 until the borelight’s visible laser centers on the borelight circle on the 10-meter boresight target.
- Turn the borelight off. Move your weapon off the crosshair, realign the red dot of the M68 on the crosshair, and turn the borelight back on. If the borelight is on the circle and the red dot of the M68 is on the crosshair, your weapon system is now boresighted.
- Note: The M68 is parallax free beyond 50 meters. Boresight at 10 meters. In order to get a solid boresight, acquire the same sight picture and cheek-to-stock weld position each time.
- Turn the laser off. To avoid damaging the borelight device, carefully remove it, and the mandrel, from the weapon.
25-Meter Zero Procedure without Borelight
10-52. If the borelight is unavailable, conduct a 25-meter zero–
- Use the same standards as with iron sights.
- Starting from center mass of the 300-meter silhouette on the 25-meter zero target, count down
1.4 centimeters and make a mark. This is now the point of impact.
- Make a 4-by-4 square box around the point of impact. This box is now the offset and is the designated point of impact for the M68.
- Aim center mass of the 300-meter silhouette and adjust to the M68 so that the rounds impact in the 4-by-4 square box, 1.4 centimeters down from the point of aim.
– Two clicks = 1 cm at 25 m for windage and elevation.
One click clockwise on elevation moves bullet strike down.
One click clockwise on windage moves bullet strike left.
5. Zero only on the M16A2 25-meter zero target.
Note: At ranges of 50 meters and beyond, parallax is minimal. However, at ranges of 50 meters and closer, keep the red dot centered while zeroing. Use the same aiming method (one or both eyes open) for zeroing that you plan to use to engage targets.
Check the light for proper intensity before opening the front lens cover. Close the front lens cover before turning the rotary switch counterclockwise to the OFF position. Failure to follow this warning could reveal your position to the enemy.
BORESIGHTING AN/PAS-13 (V2) AND (V3) THERMAL WEAPON SIGHTS
10-53. Boresight and zero both the narrow and wide FOVs. Zero at 25 meters to ensure you have zeroed the TWS properly:
- Select the proper 10-meter boresight target for the weapon/TWS configuration and, with the help of an assistant, place the boresight target 10 meters in front of the weapon.
- Ensure the M16/M4 reticle displays. Assume a stable supported firing position behind your weapon, and look through the TWS.
- Place a finger on each oval of the 10-meter boresight target. Aim between your fingers with the 300-meter aiming point. Adjust the TWS until the borelight’s visible laser centers on the borelight circle’s 10-meter boresight target.
- Have gunner move off the aiming block, realign the TWS to the center of the heated block, and then turn the borelight back on. Ensure you still have the proper boresight alignment. Now you are boresighted.
- Change the FOV on the sight by rotating the FOV ring, and repeat steps (1) through (4).
- Turn the laser off. To avoid damaging the borelight device, carefully remove it and the mandrel from the weapon.
25-METER ZERO PROCEDURE
10-54. Ensure you zero both FOVs.
- Use the same procedures and standards as with iron sights (Figure 10-26).
- At the 25-meter range, each increment of azimuth or elevation setting moves the strike of the round as follows: –1 1/4 centimeters for medium TWS on wide FOV. –3/4 centimeter for MTWS on narrow FOV.
- –3/4 centimeter for heavy TWS on WFOV.
–1/4 centimeter for HTWS on NFOV.
- Retighten the rail grabber after you fire the first three rounds.
- Select the proper 10-meter boresight target for the weapon-to-AN/PAQ-4B/C configuration and, with the help of an assistant, place the boresight target 10 meters in front your weapon.
- Install the borelight filter and turn on the AN/PAQ-4B/C. Align the 10-meter boresight target with the visible laser of the borelight.
- Adjust the adjusters on the AN/PAQ-4B/C until the IR laser is centered on the crosshair located on the 10-meter boresight target. –Keep the boresight target and zeroing mark stable during the boresight procedure.
–Do not turn the adjustment screws too much or they will break. Regardless of the mounting location, the adjuster that is on top or bottom will always be the adjuster for elevation and the one on the side will be the windage adjuster.
–Elevation adjustment screw-one click at 25 meters = 1 centimeter. –Windage adjustment screw-one click at 25 meters = 1 centimeter.
25-Meter Zero Procedures
10-55. If the borelight is unavailable, conduct a 25-meter zero (Figure 10-27) as follows:
- Use the same standards as for the iron sights.
- Preset the adjusters IAW TM 11-5855-301-12&P.
- Prepare 25-meter zero target by cutting a 3×3-centimeter square out of the center of the silhouette.
- Elevation Adjustment Screw-one click at 25 m = 1 cm (clockwise = up). Windage Adjustment Screw-one click at 25 m = 1 cm (clockwise = left).
- Retighten rail grabber after the first three rounds are fired.
Note: When cutting the 3-centimeter square out of the target, some of the strike zone may be cut out. Exercise care when annotating the impact of the rounds. When the weapon is close to being zeroed, some of the shots may be lost through the hole in the target.
- Select the proper 10-meter boresight target for the weapon and AN/PEQ-2A configuration and, with the help of an assistant, place the boresight target 10 meters in front your weapon.
- Install the filter on the aiming laser and turn on the AN/PEQ-2A. Align the 10-meter boresight target with the visible laser of the borelight.
- Adjust the adjusters on the AN/PEQ-2A until the IR laser centers on the crosshair located on the 10-meter boresight target.
- Adjust the illuminator in the same manner.
- Turn the laser off. To avoid damaging the borelight device, carefully remove the borelight and the mandrel from the weapon.
–Each click of elevation and windage is 1 centimeter. For ease, round up one square. However, each square of the 25-meter zero target is 0.9 centimeter, which affects large adjustments.
–Do not turn the adjustment screws too much, or they will break. Regardless of the mounting location, the adjuster that is on top or bottom will always be the adjuster for elevation and the one on the side will be the windage adjuster.
25-METER ZERO PROCEDURES
10-56. If a borelight is unavailable, you must conduct a 25-meter zero:
- Follow the same standards as you did with iron sights.
- Preset the adjusters IAW TM 11-5855-308-12&P.
- Prepare the 25-meter zero target by cutting out a 3×3-centimeter square in the center of the target and E-type silhouette.
- Turn the aiming beam on in the low power setting (AIM LO). Install aim point filter to eliminate excessive blooming. The adjustments for the AN/PEQ-2A (top mounted) follow:
Elevation Adjustment Screw–One click at 25 m = 1 cm or one square (clockwise = up).
Windage Adjustment Screw–One click at 25 m = 1 cm or one square (clockwise = right).
Elevation Adjustment Screw–One click at 25 m = 1 cm or one square (clockwise = down).
Windage Adjustment Screw–One click at 25 m = 1 cm or one square (clockwise = right).
- Retighten rail grabber and AN/PEQ-2A.
- Once you have zeroed the aiming beam, rotate the selector knob to the DUAL LO, DUAL LO/HI, or DUAL HI/HI mode, and observe both aiming and illumination beams. Rotate the illumination beam adjusters to align the illumination beam with the aiming beam.
Note: To ensure zero retention–
- Ensure you fully tighten the mounting brackets and the AN/PEQ-2A thumbscrew prior to zeroing.
- Remove the TPIAL and rail grabber as a whole assembly, and then place it back onto the same notch.
MISFIRE PROCEDURES AND IMMEDIATE ACTION
10-57. A misfire is the failure of a chambered round to fire. Ammunition defects and faulty firing mechanisms can cause misfires.
10-58. A stoppage is a failure of an automatic or semiautomatic firearm to complete the cycle of operation. You may apply immediate or remedial action to clear the stoppage. Some stoppages cannot be cleared by immediate or remedial action and may require weapon repair to correct the problem. Immediate action involves quickly applying a possible correction to reduce a stoppage without looking for the actual cause. Remedial action is the action taken to reduce a stoppage by looking for the cause and to try to clear the stoppage once it has been identified. To reduce a stoppage–
10-59. Take immediate action is taken within 15 seconds of a stoppage.
- Ensure the decocking/safety lever is in the FIRE position.
- Squeeze the trigger again.
- If the pistol does not fire, ensure the magazine is fully seated, retract the slide to the rear, and release.
- Squeeze the trigger.
- If the pistol does not fire again, remove the magazine and retract the slide to eject the chambered cartridge. Insert a new magazine, retract the slide, and release to chamber another cartridge.
- Squeeze the trigger.
- If the pistol still does not fire, perform remedial action.
10-60. Remedial action is taken to reduce a stoppage by looking for the cause.
- Clear the pistol.
- Inspect the pistol for the cause of the stoppage.
- Correct the cause of the stoppage, load the pistol, and fire.
- If the pistol fails to fire again, disassemble it for closer inspection, cleaning, and lubrication.
M16A2/3/4 And M4 Carbine Rifles
10-61. Use the key word SPORTS to help you remember the steps to apply immediate action:
S P O R T S S LAP gently upward on the magazine to ensure it is fully seated and
the magazine follower is not jammed. PULL the charging handle fully to the rear. OBSERVE for the ejection of a live round or expended cartridge. * RELEASE the charging handle (do not ride it forward). T AP the forward assist assembly to ensure bolt closure. SQUEEZE the trigger and try to fire the rifle.
* If the weapon fails to eject a cartridge, perform remedial action
10-62. To apply the corrective steps for remedial action, first try to place the weapon on SAFE, then remove the magazine, lock the bolt to the rear, and place the weapon on safe.
M249 SAW and M240B Machine Guns
10-63. If either weapon stops firing, the same misfire procedures will apply for both. You will use the keyword POPP, which will help you remember the steps in order. While keeping the weapon on your shoulder, Pull and lock the charging handle to the rear while Observing the ejection port to see if a cartridge case, belt link, or round is ejected. Ensure the bolt remains to the rear to prevent double feeding if a round or cartridge case is not ejected. If a cartridge case, belt link, or round is ejected, Push the charging handle to its forward position, take aim on the target, and Press the trigger. If the weapon does not fire, take remedial action. If a cartridge case, belt link, or round is not ejected, take remedial action.
10-64. If immediate action does not remedy the problem, the following actions may be necessary to restore the weapon to operational condition:
Cold Weapon Procedures
10-65. When a stoppage occurs with a cold weapon, and if immediate action has failed–
- While in the firing position, grasp the charging handle with your right hand, palm up; pull the charging handle to the rear, locking the bolt. While keeping resistance on the charging handle, move the safety to SAFE and return the cocking handle.
- Place the weapon on the ground or away from your face. Open the feed cover and perform the five-point safety check. Reload and continue to fire.
- If the weapon fails to fire, clear it, and inspect the weapon and the ammunition.
Hot Weapon Procedures
10-66. If the stoppage occurs with a hot weapon (200 or more rounds in less than 2 minutes, or as noted previously for training)–
- Move the safety to SAFE and wait 5 seconds. During training, let the weapon cool for 15 minutes.
- Use Cold Weapon Procedures 1 through 3 above.
Jammed Charging Handle
10-67. If a stoppage occurs and the charging handle cannot be pulled to the rear by hand (the bolt may be fully forward and locked or only partially forward) take the following steps:
- Try once again to pull the charging handle by hand.
- If the weapon is hot enough to cause a cook-off, move all Soldiers a safe distance from the weapon and keep them away for 15 minutes.
- After the gun has cooled, open the cover and disassemble the gun. Ensure rearward pressure is kept on the charging handle until the buffer is removed. (The assistant gunner can help you do this.)
- Remove the rounds or fired cartridges. Use a cleaning rod or ruptured cartridge extractor if necessary.
–In a training situation, after completing the remedial action procedures, do not fire the gun until an ordnance specialist has conducted an inspection.
–In a combat situation, after the stoppage has been corrected, you may change the barrel and try to fire. If the weapon fails to function properly, send it to the unit armorer.
10-68. Reflexive fire is the automatic trained response to fire your weapon with minimal reaction time. Reflexive shooting allows little or no margin for error. Once you master these fundamentals, they will be your key to survival on the battlefield:
- Proper firing stance.
- Proper weapon ready position.
- Aiming technique.
- Aim point.
- Trigger manipulation.
PROPER FIRING STANCE
10-69. Regardless of the ready position used, always assume the correct firing stance to ensure proper stability and accuracy when engaging targets. Keep your feet about shoulder-width apart. Toes are pointed straight to the front (direction of movement). The firing side foot is slightly staggered to the rear of the nonfiring side foot. Knees are slightly bent and the upper body is leaned slightly forward. Shoulders are square and pulled back, not rolled over or slouched. Keep your head up and both eyes open. When engaging targets, hold the weapon with the butt of the weapon firmly against your shoulder and the firing side elbow close against the body.
PROPER WEAPON READY POSITION
10-70. The two weapon ready positions are the high ready and low ready (Figure 10-28).
Low Ready Position–Place the butt of the weapon firmly in the pocket of your shoulder with the barrel pointed down at a 45-degree angle. With your nonfiring hand, grasp the handguards toward the front sling swivel, with your trigger finger outside the trigger well, and the thumb of your firing hand on the selector lever. To engage a target from this position, bring your weapon up until you achieve the proper sight picture. This technique is best for moving inside buildings.
High Ready Position–Hold the butt of the weapon under your armpit, with the barrel pointed slightly up so that the top of the front sight post is just below your line of sight, but within your peripheral vision. With your nonfiring hand, grasp the handguards toward the front sling swivel. Place your trigger finger outside the trigger well, and the thumb of your firing hand on the selector lever. To engage a target from this position, just push the weapon forward as if to bayonet the target and bring the butt stock firmly against your shoulder as it slides up your body. This technique is best suited for the lineup outside of a building, room, or bunker entrance.
10-71. The four aiming techniques with iron sights all have their place during combat in urban areas, but the aimed quick-kill technique is often used in precision room clearing. You need to clearly understand when, how, and where to use each technique.
Slow Aimed Fire–This technique is the slowest but most accurate. Take a steady position, properly align your sight picture, and squeeze off rounds. Use this technique only to engage targets beyond 25 meters when good cover and concealment is available, or when your need for accuracy overrides your need for speed.
Rapid Aimed Fire–This technique uses an imperfect sight picture. Focus on the target and raise your weapon until the front sight post assembly obscures the target. Elevation is less critical than windage when using this technique. This aiming technique is extremely effective on targets from 0 to 15 meters and at a rapid rate of fire.
Aimed Quick Kill–The aimed quick kill technique is the quickest and most accurate method of engaging targets up to 12 meters and greater. When using this technique, you must aim over the rear sight, down the length of the carry handle, and place the top 1/2 to 3/4 of an inch of the front sight post assembly on the target.
Instinctive Fire–This is the least accurate technique and should only be used in emergencies. It relies on your instinct, experience, and muscle memory. In order to use this technique, first concentrate on the target and point your weapon in the general direction of the target. While gripping the handguards with your nonfiring hand, extend your index finger to the front, automatically aiming the weapon on a line towards the target.
10-72. Short-range engagements fall into two categories based on the mission and hostile threat.
Lethal Shot Placement–The lethal zone of the target is center mass between the waist and the chest. Shots in this area maximize the hydrostatic shock of the round.
Incapacitating Shot Placement –The only shot placement that guarantees immediate and total incapacitation is one roughly centered in the face. Shots to the side of the head should be centered between the crown of the skull and the middle of the ear opening, and from the center of the cheekbones to the middle of the back of the head.
10-73. Due to the reduced reaction time, imperfect sight picture, and requirement to effectively place rounds into threat targets, you must fire multiple rounds during each engagement in order to survive. Multiple shots may be fired using the controlled pair, automatic weapons fire, and the failure drill methods.
Controlled Pair–Fire two rounds rapid succession. When you fire the first, let the shot move the weapon in its natural arc and do not fight the recoil. Rapidly bring the weapon back on target and fire the second round. Fire controlled pairs at an individual target until he goes down. When you have multiple targets, fire a controlled pair at each target, and then reengage any targets left standing.
Automatic Fire–You might need automatic weapons fire to maximize violence of action or when you need fire superiority to gain a foothold in a room, building, or trench. You should be able to fire six rounds (two three-round bursts) in the same time it takes to fire a controlled pair. The accuracy of engaging targets can be equal to that of semiautomatic fire at 10 meters.
Failure Drill–To make sure a target is completely neutralized, you will need to be trained to execute the failure drill. Fire a controlled pair at the lethal zone of the target, and then fire a single shot to the incapacitating zone. This increases the probability of hitting the target with the first shot, and allows you to incapacitate him with the second shot.