Type: BB air pistol. Manufacturer: Umarex. Model: H&K USP. Materials: Mostly Plastic exterior with metal magazine and internal parts. Weight: 1.8 pounds. Barrel: 4 inches, metal non-rifled. Propulsion: CO2 x 1. Action: Semi auto, double action. Ammunition Type: 4.5mm BB's. Ammunition Capacity: 22 round magazine. FPS: 400. This is another low cost replica air gun from Umarex designed for the more entry level buyer. It's actually a very well made gun despite all the plastic parts and it even has all the H&K USP licensing and trademarks. There is a lot of good with the Umarex H&K USP, it's fairly consistent and accurate, has good fps, uses "good quality" plastic, and comes in at a very affordable price. Read full article here: https://www.replicaairguns.com/2011/2/17/umarex-hk-usp-co2-45mm-bb-pistol-review.html Buy UMAREX H&K USP CO2 4.5MM BB PISTOL in Canada: https://www.replicaairguns.ca/umarex-h-k-usp-bb-pistol Buy UMAREX H&K USP CO2 4.5MM BB PISTOL in the US: https://www.replicaairguns.us/umarex-h-k-usp-bb-pistol