Crosman Bushmaster Automatic CO2 Powered BB Air Rifle with Dual Action with Red Dot " Tactical Multi-Purpose Weapon " AR Platform with Mock suppressor " Adaptable " Full-Auto/Semi-Auto " Customize it with your own AR Stock and or Pistol grip " AR compatible Buffer tube " AR compatible Pistol Grip " Picatinny Quad Rail forearm for accessory mounting " 25 rd drop magazine " Includes: Red dot Action: Full/Semi-Auto Barrel Material: Steel Barrel Type: Smooth Bore Caliber: BB (.177) Material: Nylon Fiber Mounting Rail: Picatinny Powerplant: CO2 Front Sight: None Rear Sight: None Safety: Selector Steel BB Velocity: Up to 430 fps Stock Material: Nylon Fiber Stock Style: Adjustable Requires (2) 12gr. CO2 Cartridges (NOT Included)