Cryptic 9mm PCC Bolt designed for Glock and Colt style magazines and drop-in mag well adapters. It features an extra-heavy duty, 4140 heat-treated external extractor for 9mm cases, a 416 heat-treated stainless-steel bolt, and a stainless steel firing pin with spring. Includes a removable counter weight and a dust cover compatible design. The aluminum guide key (gas key) is installed with self-locking bolts, eliminating staking. It is finished in Black Nitride and compatible with mil-spec buffers and springs. Weight is 13.5 oz. Compatible with most aftermarket triggers.