Close Quarters Battle Receiver
US assault rifle
This article does not have any sources. (October 2023) |
The Close Quarter Battle Receiver (CQBR) is an alternative upper receiver for the M4A1 Carbine. It was developed by the US Navy.
![](http://up.wiki.x.io/wikipedia/commons/thumb/7/7f/M4A1-CQBR.png/220px-M4A1-CQBR.png)
A M4 upper receiver with a shortened barrel of 10.5” inches in length and has two variants, the Mod 0 and Mod 1.