AirArms S510 XS Stealth Carbine Features Precharged pneumatic Air Arms Q-Tec moderator permanently affixed for added noise reduction Smooth sidelever cocking mechanism 10-shot repeater 2-stage adjustable trigger with safety 11mm scope grooves (no open sights) 250 Bar / 3,626 PSI Fill Pressure Built-in manometer (air pressure gauge) Built-in adjustable power Fully shrouded Lothar Walther barrel with integral moderator Ambidextrous poplar Monte Carlo stock Checkered pistol grip and forearm Fully-Regulated 186cc cylinder 40 shots in .177, 35 shots in .22, 30 shots in .25 Includes one rotary magazine, 4 hex wrenches, and fill adapter