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The Close Quarter Battle Receiver (CQBR) is a replacement upper receiver for the M4A1 Carbine, developed by the US Navy. The CQBR features a barrel 10.3 in (262 mm) in length, similar to the Colt Commando short-barreled M16 variants of the past. This shorter barrel makes the weapon significantly more compact, which makes it easier to use in and around vehicles and in tight confined spaces. Special units such as commandos boarding ships and bodyguards for senior officers have found such shortened weapons very useful and use the CQBR.
Its preliminary National Stock Number was 1005-LL-L99-5996; however, a complete CQBR-equipped carbine now has the NSN 1005-01-527-2288. The overall length of the upper receiver is 19.25 inches (489 mm). With the stock retracted, the overall length of the weapon is 26.75 inches (679.4 mm).
For sale no trades
Mk18 CQBR upper
Colt Factory reciever
Daniel Defense 10.3 barrel
Daniel Defense MK18 Ris 2 handguard
Surefire 4 prong
Colt or Daniel Defense BCG and CH
No tango down stubby
Call or text if interested
Selling low round count CQBR upper.
Less then 400 through it
DD ris II FDE
DD has block
Fully loaded would have
Ergo rail ladders
Surefire 3 prong
Tango down stubby
Hey guys! Selling a new build but slightly used barrel.
FN tan anodized receiver set
Daniel Defense 10.3 Barrel
Badger ordinance gas block
Geissele DDC MK8 9.5" rail
Geissele DDC CH
B5 coyote grip
WMD FDE LPK
Tanodized Dust cover
SB tactical FDE brace