This threaded outer barrel replaces the stock outer barrel of the Socom Gear M9 gas blow back pistol. The barrel is made from aluminum and practically drops into the Socom Gear M9 with little to no modification. The threaded barrel accepts most 14mm counter clockwise barrel extensions which will be wont to conceal an extended inner barrel for increased accuracy. This barrel may be a good way to dress up your Socom Gear M9 and separate yourself from the pack.