Brigade Manufacturing BM-9 Rifle 9mm Features The Brigade Manufacturing BM-9 Rifle 9mm utilizes a 416R stainless steel 16 barrel with a 1:10 twist rate that promotes higher velocity and stable 9mm performance. Its direct blowback operating system with Last Round Bolt Hold Open LRBHO delivers reliable cycling and smooth recoil impulse. A Brigade MFG Mini Can muzzle device with 1/2x36 threading completes the rifle-length configuration. Built as a 9mm AR-9 pistol caliber carbine this rifle features a 15 M-LOK free float rail for accessory mounting flexibility and familiar AR ergonomics with an A2 pistol grip. Mil-spec trigger group 9mm BCG and charging handle provide consistent operation while the adjustable 6-position stock and heavy 7.2 oz buffer enhance control and balance for competition or range use. Brigade Manufacturing BM-9 Rifle 9mm Specifications Manufacturer: Brigade Manufacturing Model: BM-9 Rifle Caliber: 9mm Barrel Length: 16 Twist Rate: 1:10 Capacity: 33 Platform: AR-9 Operating System: Semi-Auto Direct Blowback Receiver Material: 7075-T6 Aluminum Forging Barrel Material: 416R Stainless Steel Rail: 15 M-LOK Free Float Handguard Diameter: 1.35 Threading: 1/2x36 Muzzle Device: Brigade MFG Mini Can Stock: Standard Adjustable 6-Position Buffer Weight: 7.2 oz Heavy Buffer Trigger: Mil-Spec Bolt Carrier Group: 9mm Direct Blowback Magazine: Glock 33rd Magazine Included Finish: Cerakote FDE Overall Length: 31.5 Stock Not Extended Weight: 6.75 lb Color: FDE Made In America: Yes