The GLOCK 17 Gen 5 MOS BB pistol is the ticket for airgunning with the latest in the GLOCK design evolution. With Gen 5 design features and MOS (Modular Optics System) red dot mounting headlining the features of this CO2 powered BB pistol, you can mount nearly any micro pistol optic on the market, and via the underbarrel accessory rail, a laser or light of your choice as well. The GLOCK 17 Gen 5 accepts common 12 gram non-threaded CO2, which is housed in the 17-round drop-free magazine and shoots steel BBs at 300 FPS. 4 adapter plates are included. The optic mounting footprints are: Docter (M3), Trijicon (6-32 UNC), C-More (8-32 UNC), and Leupold (M4). Optics known to work with this air pistol: Umarex RDS8, Triicon SRO, Trijicon RMR, Vortex Viper.