Crosman DPMS SBR Full-Auto CO2 Air Rifle Tactical Short Barrel Rifle Adjustable 6 Position Butt Stock AR Compatible Pistol Grip Quad Rail forearm for accessory mounting Unique muzzle end cap Flip up back up iron sights (BUIS) Angled Foregrip Realistic Weight and Functions Blowback bolt-action 25rd magazine Uses 2 12-gram CO2 cartridges Length: 26.9â€ to 30.4â€ Includes BB Speedloader ... ...