FX Crown MkII PCP Air Rifle, Synthetic Stock Ambidextrous thumbhole synthetic stock Smooth sidelever cocking system Superlight Smooth Twist X (STX) barrel offers more rigidity, yet is about A 1/2-pound lighter than previous version Includes Superior liner Interchangeable calibers and barrel liners (additional calibers and liners sold separately) Fully shrouded barrel Updated breech block with four barrel set screws for more rigidity = better performance Upgraded action with integrated 20 MOA Picatinny rail Breech block upgrade allows for caliber changes without removing scope Externally adjustable AMP (Adjustable Match Precision) regulator Externally adjustable hammer spring tension 3-step transfer port adjustment Dual pressure gauges: one for air tube pressure, one for regulator pressure Removable 480cc carbon fiber air cylinder Max fill pressure is 250 bar (3600 psi) Magazine Capacity: 21 rds. in .177, 18 rds. in .22, 15 rds. in .25, 13 rds. in .30 Shots per fill: 200 in .177, 120 in .22, 70 in .25, 45 in .30 500mm (19.685") or 600mm (23.62") barrel options 28% more plenum volume and larger valving allow for more power than ever before 500mm barrel models have an overall length of 45" with moderator 600mm barrel models have an overall length of 49" with moderator Two-stage adjustable, match trigger Adjustable buttpad Male quick-disconnect Foster fitting Includes one magazine, hardcase, and 3-year transferable warranty