Owners of the G&G GTP9 GBB pistol can check this new kit from G&G... "The GTP 9 Full Auto Cylinder Kit is a direct OEM replacement designed for the GTP 9 Full-Auto. (Note: Installing the GTP 9 Full Auto Cylinder Kit into a standard GTP 9 will not make it shoot full-auto.) Coming Soon. Contact your local dealer for pricing and availability."