Type: BB air rifle. Manufacturer: Umarex. Model: H&K MP5K PDW Materials: Polymer shell, metal inner frame, metal trigger, metal cocking handle, metal but-plate. Weight: 2.4 pounds. Barrel: 9.75 inches, metal, non-rifled. Propulsion: CO2 x1. Action: Semi auto blowback. Ammunition Type: Steel BBs 4.5mm. Ammunition Capacity: 40 rounds FPS: 400 The Umarex H&K MP5K PDW 4.5mm BB Replica is a very realistic BB Repeater. It's fun to shoot and seems to have an endless magazine. The Blowback does give it s little bit of recoil when you have a fresh CO2, just don't expect too much. The outer shell of the gun is mainly made out of plastic but for about $125 you really can't expect an all metal version. If you're looking for a true Tactical styled BB gun, this would make an excellent choice. Read full article here: https://www.replicaairguns.com/2010/7/9/umarex-mp5k-pdw-bb-airgun-review.html Buy Umarex MP5K PDW BB in Canada: https://www.replicaairguns.ca/umarex-h-k-mp5k-pdw Buy Umarex MP5K PDW BB in the US: https://www.replicaairguns.us/umarex-h-k-mp5k-pdw