Springfield Armory XDM 4.5", .177 cal. CO2 Blowback, Black Metal Slide - Black Improved larger magazine follower Rugged Polymer Frame Full Blowback Interchangeable backstraps (small, medium, large) Field Strips just like the real steel XDM Authentic grip safety Funcitonal striker status indicator Operates on (1) 12 gram CO2 cartridge 20 rd. drop free magazine Ambidextrous magazine release Functional slide stop lever Functional trigger safety Manual lockout safety Red Fiber Optic Front sight Two dot rear sight Picatinny accessory rail