Umarex Outpost NitroAir PCP Air Rifle Unique NCR system with NitroAir recyclable/disposable nitrogen cartridge Dual power system can also use included 3,625 PSI tank Sidelever cocking Includes 250cc PCP air cylinder Uses .25 caliber pellets 13-round removable rotary magazine 1/2x20 threaded muzzle with cap Internal regulator set to 1,800 PSI Max. fill pressure: 3,625 PSI (250 BAR) Max. velocity: 830 FPS (w/ 24gr pellet) Max. energy: 38 FPE (w/ 24gr pellet) Manual button safety Integrated side-facing pressure gauge on air tube Extended Picatinny optics rail M-LOK accessory slots on both sides of handguard Folding buttstock with ridged rubber buttpad Magazine storage in buttstock Adjustable cheek rest Male Foster quick-disconnect fill port Includes single-shot tray, two 13-round magazines, two NitroAir cartridges Overall length: 37.5" (stock extended), 28.46" (stock folded)