Full metal build makes it durable but adds little weight to your gas blowback pistol Fits and feed with Army Armament 1911 GBB pistols as well as other 1911 style pistols Reliable feeding spring will get out every shot making it a great spare magazine to have on hand After filling the mag the gas efficiency is improved through every shot by getting out every BB at the same rate Holds up to 25 rounds and easily empties the magazine in a single refill Green gas