XM15-E2S A3 450BM 20" 5+1 MLOK Manufacturer Model Number: 00-10010-BLK Manufacturer: Bushmaster Model: A3 Caliber: 450 Bushmaster Type: Rifle Item Type: Firearm Firearm / Accessory Action: Semi-Auto Firearm / Accessory Capacity: 5 + 1 Finish: Matte Black Sights: No Sights Stock Frame Grips: Synthetic Stock A2 Fixed Stock Magazine Quantity and Description: 1 5 Round Overall Length: 40" Weight: 7.06 lbs. Shipping Weight: 9.7 Feature: Carbine Length Gas System Feature: Snake Charmer Muzzle Brake Feature: Nitride Bolt Carrier Group Optic Adjustable Objective: false Optic Reticle Illuminated: false