Brownells GBB M4 Carbine Buffer

Currently out of stock across all retailers.

"Bolt Bounce is now a rumor of the past" A problem a lot of GBBR M4s run into is bolt bounce; Where the bolt bounces against the chamber as the cycle comes to an end. This can cause feed issues, problems with the hop-up performance, and a less than desirable recoil experience. The Brownells buffe...