The Faxon Blowback BCG 9mm Black Nitride is a premium bolt carrier group designed specifically for 9mm AR-15 pistol caliber carbines. Engineered with dual Glock/Colt-compatible geometry this Generation 2 model offers full-auto compatibility and a ramped bottom perfect for any trigger making it ideal for competition or casual shooting. Key upgrades include a durable AR-15 pivoted and sprung extractor a user-friendly standard firing pin cotter pin for quick disassembly and a strategically designed carrier key for enhanced durability under heavy use. Constructed from fully heat-treated 8620 steel with a sleek Salt Bath Nitride finish this BCG ensures reliable performance and precision. Compatible with JP enterprises buffer systems MP5 magazine lowers dust covers and M16 setups it delivers superior versatility for Glock or Colt-style lower receivers.