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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 Mk 18 Mod 0 was a 40x46mm grenade launcher used by the United States Navy during the Vietnam War and also the last known hand crank operated firearm since the Gatling gun. It was replaced by the Mk 19 grenade launcher in service with the United States Armed Forces .
M4A1s with the CQBR were designated the Mk 18 Mod 0. The Block II program then focused on component improvements to the M4A1, with the adoption of the heavier "SOCOM profile" barrel in 2004 and free-float Rail Interface System II (RIS-II) handguard from Daniel Defense in 2008. Owing to the modularity of the AR-15/M4 platform, some operators ...
The United States Navy Mk 12 MOD 0/1/H Special Purpose Rifle (SPR) is a designated marksman rifle that was in service with United States Special Operations Forces in the designated marksman role until 2017, also designed to be shorter than standard weapons.
This list contains weapons that are classified as crew-served, as the term is used in the United States military.. While the general understanding is that crew-served weapons require more than one person to operate them, there are important exceptions in the case of both squad automatic weapons (SAW) and sniper rifles.
The C8CQB is similar to the American Mark 18 Mod 0 CQBR, having a 254-millimetre (10.0 in) or 295-millimetre (11.6 in) heavy barrel and a Vortex Flash Hider made by Smith Enterprise Inc. [15] The smaller Personal Defense Weapon (PDW) variant has an overall length of 530 mm (20.7 in) with its stock fully retracted. It has a 145 mm (5.7 in ...
The Special Operations Peculiar MODification (SOPMOD) kit is an accessory system for the M4A1 carbine, CQBR, FN SCAR Mk 16/17, HK416 and other weapons used by United States Special Operations Command (USSOCOM) special forces units, though it is not specific to SOCOM.
The SCAR-L, designated Mk 16 by USSOCOM, was intended to replace the M4A1, the Mk 18 CQBR and the Mk 12 SPR that had been in service (before SOCOM decided to cancel the order for the Mk 16 Mod 0, see below), whereas the Mk 17 (SCAR-H) had been intended to replace the M14 and Mk 11 sniper rifles in use. However, the weapon will only supplement ...