The 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.Oal: 26.50"Type: Air RifleAction: Semi-AutoCaliber: 177 BBCapacity: 25rdFinish: BlackSights: Flip Up Front & RearWeight: 6.20 lbsStock: 6 Position BlackScope: NoBarrel Type: SmoothVelocity: 430 fpsPower Type: CO2