Q LLC

The Two Piece BCG is designed to be manufactured on modern equipment using modern materials. Q's BCG consists of 2 sections; The Front-End and The Ass-End. 

The front end is made up of Maraging Stainless Steel dressed in black with a Nitride Coating, is SCAR-Cut to help prevent bolt bounce, and comes standard with: Mil-Spec Gas Key and Staking, Mil-Spec Bolt, Mil-Spec Cam Pin, and Mil-Spec Firing Pin. 

The Ass-End is naked Stainless Steel, heat treated of course and yes, the overall length is Mil-Spec. The Ass-End holds the firing pin, doing away with pesky firing pin retaining pins. No more broken pins. You're welcome. The Carrier is retained with a single Pin allowing for easy field stripping. There you have it, Q's answer to a 60 year old problem. Actually Good.