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For use as an ad-hoc automatic rifle, the M16 and M16A1 could be equipped with the XM3 bipod, later standardized as the Bipod, M3 (1966) [177] and Rifle Bipod M3 (1983). [178] Weighing only 0.6 lb, the simple and non-adjustable bipod clamps to the barrel of the rifle to allow for supported fire.
The maximum effective range is approximately 150 meters. [211] This cup-type launcher can also be used to launch tear-gas grenades. All current M16 type rifles can mount under-barrel grenade-launchers such as the M203 and M320: All current AK-47 type rifles can mount under-barrel grenade-launchers such as the GP-25 series
Barrel length Barrel profile Barrel twist Bayonet Lug Muzzle device CR6724 Colt Accurized Rifle A2 FF Tube S-1 Flattop Yes Yes .223 REM 5.56 NATO 24 in. Stainless HBAR 1:9 No None CR6720 Colt Accurized Rifle A2 FF Tube S-1 Flattop Yes Yes .223 REM 5.56 NATO 20 in. Stainless HBAR 1:9 No None CRM16A1 M16A1 Retro Reissue A1 Triangular S-1 A1 Yes No
In Afghanistan, troops found that M855 rounds also suffered at long ranges. Although 5.56 mm rifles have an effective range of 450–600 meters, the M855 bullet's performance falls off sharply beyond 300 meters. The ranges are even shorter for short-barreled carbines. Half of small-arms attacks were launched from 300 to 900 meter ranges. [134]
The Close Quarter Battle Receiver (CQBR) [5] is a replacement upper receiver for the M4A1 carbine developed by the US Navy.. The CQBR features a 10.3 in (262 mm) length barrel (similar to the Colt Commando short-barreled M16 variants of the past) which makes the weapon significantly more compact, thus making it easier to use in, and around, vehicles and in tight, confined spaces.
The Marine Scout Sniper Rifle (MSSR) is a Philippine semi-automatic designated marksman rifle developed by the Philippine Marine Corps for their Marine Scout Snipers.Designed in the mid-1990s to replace severely-outdated battle rifles then used as marksman rifles, the MSSR is essentially an M16A1 that has been heavily modified and accurized to serve as a marksman rifle.
The Colt Automatic Rifle or Colt Light Machine Gun is a 5.56 mm NATO, open-bolt, full-automatic-only firearm developed by Colt Defense. It is based on the M16A2/A4 , and has a distinctive squared-off handguard, vertical grip, carrying handle and integrated bipod.
The Type CQ is an unlicensed Chinese variant of the M16 rifle manufactured by Norinco. [3] According to the Norinco website, the rifle is officially known as CQ 5.56. [4]It can be distinguished from other AR-15 and M16 pattern rifles by its long, revolver-like pistol grip, somewhat rounded handguards, and the unique shape of its stock.