Mitchell Defense Enhanced One-Piece AR 9mm Blowback Bolt Carrier Group Billet Extractor Black. Its solid one-piece construction provides the necessary mass for smooth blowback cycling and the billet-machined extractor delivers secure case engagement. Heat-treated and finished for durability this carrier maintains consistent momentum and dependable feeding in high-round-count training competition and duty applications. Designed for robustness and long service life it provides smooth operation across direct-blowback 9mm AR platforms. Specifications for Mitchell Defense Enhanced One-Piece AR 9mm Blowback Bolt Carrier Group: Manufacturer: Mitchell Defense Color: Black Finish: Nitride Fabric/Material: Steel Caliber: 9mm Luger Gun Make: AR Platform Gun Model: AR-15 Features of Mitchell Defense Enhanced One-Piece AR 9mm Blowback Bolt Carrier Group One-piece blowback carrier designed for 9mm AR platforms Billet-machined extractor for strong and reliable case engagement Heat-treated steel carrier for durability under high round counts Optimized mass for consistent blowback cycling Smooth operation in PCC duty training and competition builds Package Contents: Mitchell Defense Enhanced One-Piece AR 9mm Blowback Bolt Carrier Group What firearm models does the manufacturer say Mitchell Defense Enhanced One-Piece AR 9mm Blowback Bolt Carrier Group is compatible with? The manufacturer says that Mitchell Defense Enhanced One-Piece AR 9mm Blowback Bolt Carrier Group is compatible with AR-15Mitchell Defense 613001: Enhanced One-Piece AR 9mm Blowback Bolt Carrier Group Billet Extractor Black