Type: BB air pistol. Manufacturer: Cybergun. Model: GSR SIGARMS. Materials: Mostly metal build. Weight: 2.4 pounds. Barrel: 5.2 inches, brass, non-rifled. Propulsion: CO2 x1. Action: Semi auto non-blowback, double action only. Ammunition Type: Steel BBs 4.5mm. Ammunition Capacity: 21 rounds FPS: 397 I ordered my Cybergun Sig Sauer GSR Sigarms with two other Cybergun pistols (The Jericho 941 and Sig Sauer SP2022), all of them in the lower and more affordable price point, the GSR is the heaviest out of the bunch, most likely because of the metal frame. For a relatively inexpensive BB gun you get a lot for your money, most importantly a very accurate reproduction of the real GSR Sigarms firearm! If you're a 1911 fan and want to pick up an airgun that won't set you back too much, then the Cybergun GSR would make a great choice with it's heavy weight, full size drop out metal magazine, and true 1911 styled trigger. Read full article here: https://www.replicaairguns.com/2011/9/1/cybergun-sig-sauer-gsr-sigarms-all-metal-co2-bb-gun-review.html Buy this gun in Canada: https://www.replicaairguns.ca/cybergun-sig-sauer-gsr-sigarms-all-metal Buy this gun in the US: https://www.replicaairguns.us/cybergun-sig-sauer-gsr-sigarms-all-metal