The first pistol brought to the market by Glock was the venerable G17. This design found its way into the hands of millions of shooters and permanently etched its profile into popular culture. Over the years some revisions have been made, with the Gen 4 showing up along the way and hanging in there as a best seller to this day. The GLOCK G17 GEN 4 Air Pistol is the blowback BB repeater you have been waiting for. Powered by easy and affordable 12 gram CO2, the G17 GEN 4 is just right for holster drills, target practice, or backyard plinking.