Type: BB air pistol. Distributer: Air Venturi. Model: ISSC M22. Materials: Metal & Polymer. Weight: 1.3 pounds (590 grams). Barrel: 3.5 inches, smooth bore. Propulsion: CO2 x 1. Action: Semi auto, single and double action. Ammunition Type: Steel BB's 4.5mm. Ammunition Capacity: 18 rounds. FPS: 400 fps/ 122 m/s. All in all this may just be my new favorite blowback BB pistol, I obviously like the design since I already own the 22LR version and it does look a lot like a Glock so that may be a benefit to you Glock lovers out there. The Air Venturi ISSC M22 CO2 Blowback BB Pistol really does seem to have a lot going for it... Blowback operation, a full size drop out metal magazine that holds the CO2 and BB's, decent fps and accuracy, an adjustable rear sight, working parts where they are supposed to work on the real steel version and that Glock look and feel but without the worries of Glock coming after you for violations of their copywrite since this is a licensed ISSC M22 replica. Read full article here: https://www.replicaairguns.com/2016/2/11/air-venturi-issc-m22-co2-blowback-bb-pistol-table-top-review.html