The all new G&P GBB Roller Bolt Carrier Set B (Negative Pressure) (Chromic Coating) for Bomber GBB CNC Metal Body is an innovative design that revolutionized the performance of the WA system for those who had G&P Bomber bodies (WA) / G&P Bomber GBB(WA) .
The overall weight of the bolt has been decreased, and on the back 3 rollers were added to ensure extra smoothness of the bolt travel, both added together means the bolt travels smoother, faster and consumes less gas for each shot, enhancing gas efficiency. Comes in a chromic and gold two tone color scheme for a little subtle extra coolness in your G&P Bomber bodies (WA) / G&P Bomber GBB(WA)
Comes with an extra set of nozzle and internal parts for the bolt carrier group (BCG).