Crosman DSBR DPMS SBR Air Rifle CO2 177 25rd Shot Black Black Receiver Black 6 Position StockThe DPMS SBR Full Auto BB Rifle has the ability to put out over 1400 round per minute. It has a blowback action, 6 position butt stock, and AR compatible pistol grip. It also features a quad rail forearm for accessory mounting, flip up iron sights, an angled foregrip, and 25 round drop out magazine. It has a selector safety, weighs about 6. 21 lbs, and has a length of about 26. 5 in. It functions with the use of CO2.