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M16A3 Rifle, NSN 1005-01-367-5112 (Very Rare)

The M16A3, which was introduced in 1994, is basically an M16A2 with full-automatic capability and optional M4A1-style Rail Interface System (RIS). The M16A3 and the M16A4 are identical in appearance to the M16A2, but both have the modular upper receiver. The M16A3 is capable of fully automatic fire, like the M16A1, while the M16A4 uses the M16A2's three-round burst mechanism. Additionally, several types of optical sights have been developed for the modular upper.

M16A4 Rifle, NSN 1005-01-383-2872, LIN R97175 (In Common Usage).

The M16A4 is identical in appearance to the M16A3, but can fire single shots or 3-round bursts (no full auto). The M16A4 Rifle is a standard M16A2 Rifle with a flat top upper receiver and detachable carrying handle. The flat top upper receiver has an integral rail that will be utilized (when the carrying handle is removed) to mount optical devices to the weapon. The M16A4 Rifle in combination with the M5 Rail Adapter forms the Modular Weapon System (rifle version) which provides soldiers the flexibility to configure their weapons with those accessories required to fulfill an assigned mission. There are no differences between the internal dimensions of the M16A2 Rifle and the M16A4 Rifle.

The COEI / BII Listings and Component Hand Receipts on are valid for these two rifles.

Video:  TOP 10 Combat Rifles of All Time - M16 (No.2)

Typical Accessories:

ACOG Scope (Multiple NSN)

M4 Triple Mag Pouch

M4 Staggered Mag Pouch

CQD Sling (NSN# 8415-01-504-3087)



Major End Items
NSN Description
1010-00-179-6447 M203, 40mm Grenade Launcher
5855-01-398-4315 PAQ-4 infrared laser designator
5855-01-447-8992 PEQ-2 infrared spotlight / laser designator
1240-01-492-5264 EOTech 1x Holographic-Diffraction Optical Reflex Sight
5855-01-432-0524 PVS-14, Monocular NVG
5860-01-471-2091 Laser Borelight System (LBS); used for field-zeroing mechanical and optical sights
RFI (Rapid Fielding Initiative) Accessories (Major End Items).  Fielded routinely to units through Force Modernization program, or through RFI bulk-issue during prep for deployment.
1005-01-452-6771 M5 Rail Adapter System (allows installation of accessories, such as a PEQ-2 or Surefire Tac-Light on front handguard)
1240-01-534-1114 and others ACOG (Advanced Combat Optical Gunsight) and other magnified and unmagnified optical sights, manufactured by Trijicon.
1240-01-411-1265 M68 CCO (Close Combat Optic) 1x "Red Dot" Optical Reflex Sight, manufactured by Aimpoint
RFI (Rapid Fielding Initiative) Accessories (Non Major End Items).  Fielded routinely to units through Force Modernization program, or through RFI bulk-issue during prep for deployment.
NSN Description
1005-01-541-1772 Rifle Bipod; Also called Forward Grip Bipod
1005-01-449-6306; 1005-01-484-8000 Backup Iron Sight.  Installed in conjunction with ACOG or other optical sights; provides redundant means for aiming if optical sights fail or become detached from the weapon.
1005-01-541-1771 Tactical Sling; Also called 3-Point Sling; (Click Here for more sling NSN's)
(TBP; LIN ZA905D) Enhanced sliding M4/M4A1 buttstock assembly; currently being mounted and used on M16-series rifle in large numbers because of the need to maneuver the weapon inside confined spaces (HMMWV interiors, for instance).  However, Ground Precautionary Messages state that this is "not authorized and can result in injury or equipment damage."
Other Accessories, Non Major End Items
NSN Description
Various SureFire Tactical Flashlight
4020-01-493-8337 Tactical Sling (not the RFI version), made by Blackhawk! and distributed through the Army supply system.  Carries weapon across chest, muzzle oriented downward, "at the ready"; (Click Here for more sling NSN's)
1005-01-520-5992 / 1005-99-126-9781 Heckler & Koch (HK) High-Reliability Steel Magazine
1005-01-541-2477 Multiple magazine holder; New AAL Item, may be included in RFI in the future
1005-01-541-2476 Forward rail bracket (also called CQB kit mini-rail); New AAL Item, may be included in RFI in the future
1005-00-921-5004 Standard 30-round magazine
1005-00-118-6192 M15A2 Blank Firing Adapter / Attachment (red in color, for M16 rifle only; yellow BFA, M23, NSN 1005-01-361-8208, is for the M4 carbine only)
5340-00-880-7666 Cap, Protective, Dust.  Keeps dust and dirt from entering the muzzle during normal operations, and can be left in place until the weapon is fired, but must be removed periodically to prevent rust build-up.

Related End Items ("Also See...")

NSN Description
1005-01-231-0973 M4, Rifle, 5.56mm
1005-01-382-0953 M4A1, Rifle, 5.56mm (Rare, full-automatic version of M4)
1005-00-073-9421 M16A1, Rifle, 5.56mm
1005-01-128-9936 M16A2, Rifle, 5.56mm (Most widely-used M16 variant)
1005-00-903-0751 M134 Minigun ("Gatling Gun"), 7.62mm
1005-00-589-1271 M14, Rifle, 7.62mm
TBP Rifle, 5.56mm, HK416
1005-01-469-2133 Rifle, .50 Caliber, Sniper:  XM107 (Barrett Family)
1005-01-534-2841 XM110 Semi-Automatic Sniper System (SASS)
1005-01-240-2136 M24, Sniper Rifle, 7.62mm
1005-01-081-4582 M231, Submachine Gun, 5.56mm (Firing Port Weapon for Bradley)
1005-01-127-7510 M249, Machine Gun, 5.56mm, Belt and Magazine-Fed (Squad Automatic Weapon)
1005-01-118-2640 M9, Pistol, 9mm, Automatic, Beretta (Model 92F)
1005-00-017-9701 M7, Bayonet, Multi-Purpose (Older Model)
1005-01-227-1739 M9, Bayonet, Multi-Purpose (New Model, with saw blade and integral wire cutter)

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