Hatsan BullBoss QE Precharged pneumatic power with side-lever cocking action Bullpup design Available in .177 (4.5 mm), .22 (5.5 mm) and .25 (6.35 mm) calibers Synthetic ambidextrous stock with ergonomic design Picatinny rail for both 11 mm and 22 mm scope mounts Additional Picatinny rail beneath forearm Checkering on grip and forearm for better control and feel Elevation-adjustable Cheek Comb - Stock equipped with integrated elevation adjustment button Ventilated rubber butt pad Precision rifled and choked barrel for accuracy QuietEnergy fully shrouded barrel and Integrated Sound Moderator cuts noise by 32% Rotary magazine: .177 10-rd, .22 10-rd, .25 9-rd Includes 2 magazines Detachable steel air cylinder tube (230cc). (Spare cylinders are available) Built-in pressure gauge on the air cylinder monitors cylinder pressure Includes quick-fill nozzle & air cylinder discharging cap supplied in the box Overall blued finish, black anodized receiver Manual & Automatic Safety Anti-double pellet feed mechanism prevents more than one pellet loading into barrel Patented anti-knock system to prevent gas wastage when rifle is knocked or bounced Quattro Trigger: 2-stage full adjustable match trigger for trigger travel and trigger load Metal trigger & synthetic trigger guard Fitted sling swivels Overall length: 36.8" Barrel length: 23" Weight: 8.6 lb Muzzle energy: .177 cal=27 fpe, .22 cal=38 fpe, .25 cal=42 fpe Optimal shots per fill: .177 cal=40, .22 cal=35, .25 cal=30