Type: BB air pistol. Manufacturer: Umarex. Model: HPP. Materials: Mostly all metal construction. Weight: 1.8 pounds. Barrel: 3.6 inches, steel, non-rifled. Propulsion: CO2 x1. Action: Semi auto blowback, double action. Ammunition Type: Steel BBs 4.5mm. Ammunition Capacity: 15 rounds FPS: 410 I found this Umarex Blowback BB gun to be a really accurate, responsive and enjoyable gun to shoot. It is very compact yet has nice heft and the blowback action is snappy giving you the feeling of a real automatic weapon. The fact that this gun is so inexpensive and yet delivers great power and CO2 efficiency makes it not only affordable to buy but also shoot on a daily basis. Read full article here: https://www.replicaairguns.com/2010/8/17/umarex-hpp-co2-bb-airgun-field-test.html Buy Umarex HPP in Canada: http://www.replicaairguns.ca/umarex-hpp-blowback-bb-pistol.html Buy Umarex HPP in the US: https://www.replicaairguns.us/umarex-hpp-blowback-bb-pistol