Hatsan Velox PCP Pistol Semi-auto side bolt action Precharged pneumatic Improved trigger system Precision rifled and choked shrouded German steel barrel Steel upper receiver 1/2 UNF threaded muzzle Detachable 55cc air cylinder fills to 3,625 PSI/250 BAR (can be removed under pressure) Shots at optimal velocity*: 20 (.22), 19 (.25) Magazine capacity: 12 rounds (.22), 10 rounds (.25) Integrated pressure gauge Max. velocity (lead): 620 FPS (.22), 580 FPS (.25) Max. energy: 12.6 FPE (.22), 15 FPE (.25) Textured grip with onboard magazine storage Red fiber optic front sight Adjustable and removable green fiber optic rear sight Combination 11mm Dovetail/Weaver optics rail** Manual push button safety Foster quick-disconnect fill fitting Includes two S/Roto index magazines, two air cylinders, and custom molded hardcase Available in Black and FDE (flat dark earth) Barrel length: 5.5" Overall length): 11.4" Overall weight: 2.15 lbs. * - within 85% of peak velocity. ** Weaver mounts are not standard and certain weaver/picatinny mounts may not fit the rail correctly.