Fully Licensed Glock 17 gen.4 6mm Airsoft Co2 Full Blowback. Renown for its reliability, performance, and magazine capacity, the Elite Force Airsoft GLOCK 17 Gen4. is the go-to full size training pistol for professionals and enthusiasts. The Gen.4 model features reinforced Blowback unit and slide for durability and the modular back strap system which allows you to change the fit and feel of the grip to better suit your hands (Spare Back Straps Not Included). The frame features a new scientifically designed, real-world tested rough texture technology for improved grip. The reversible enlarged magazine catch makes reloading much easier.