Description: Caliber: .223 Remington (.223 AI) - Action: Semi-Auto - Barrel Length: 16.24", 17.25", 20.25" - Barrel Material: Stainless Steel - Barrel Features: Muzzle Brake - Receiver Material: Stainless Steel - Receiver Finish: Matte Black - Grip/Stock Material: Synthetic - Rear Sight: Adjustable |