Crosman DSFAM : This magazine is designed for use with the Crossman DPMS Full Auto air rifle.Over 1400 rounds per minute! - Blowback action - Adjustable 6 position butt stock - AR compatible pistol grip - Quad Rail forearm for accessory mounting - Unique muzzle end cap - 30 round drop-out magazine - Flip up back up iron sights (BUIS) - Angled foregrip - Realistic weight and functions - Caliber : BB - Powerplant : CO2 - Steel BB Velocity : Up to 430 fps - Action : Full/Semi-Auto - Length : 26.5 in - Product Weight : 6.21 lbs - Barrel Material : Steel - Barrel Type : Smooth Bore - Front Sight : Folding BUIS - Rear Sight : Folding BUIS - Material : Nylon Fiber - Magazine : Magazine - Mounting Rail : Picatinny - Stock Style : Adjustable - Stock Material : Nylon Fiber - Safety : Selector