This is a Cybergun distributed air pistol made by KWC, the Sig Sauer GSR is a very detailed replica of the real steel Sig Sauer GSR Sigarms 45 ACP. This Cybergun product is virtually all metal even including the side panel grips! The Cybergun Sig Sauer GSR features a full size all metal drop out magazine giving this BB pistol even more realism! It is a very heavy 2.4 pounds and has a working magazine release and safety.