Bullpup design, manual loading, side bolt action, pre-charged pneumatic (PCP) air rifle Precision rifled, choked barrel for accuracy, threaded for 1/2" UNF sound moderator & fitted muzzle cap .22 (5.5mm) caliber Detachable 12-shot magazine Includes 2 magazines and a quick-fill nozzle Black anodized aluminum receiver Picatinny rail for both 11mm and 22mm scope mounts Ambidextrous bullpup synthetic stock. Picatinny rail beneath the forearm Easy Adjust Elevation Comb - Stock equipped with integrated elevation adjustment button Elevation & cast adjustable rubber butt pad Checkering on grip & forend for better control & feel 165cc volume steel air cylinder (not detachable) Built-in pressure gauge in the forearm to monitor the cylinder pressure Patented anti-knock system to prevent gas wastage when rifle is knocked or bounced Manual safety Quattro Trigger: 2-stage full adjustable match trigger for trigger travel and trigger load