Air Arms S510 XS Ultimate Sporter Rifle FAC, Walnut Stock 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 20 Micron Filter Ambidextrous Walnut stock Adjustable cheekpiece Checkered pistol grip and forearm Adjustable rubber buttpad Rear sling swivel stud Fully-Regulated 186cc cylinder Regulator Output Pressure: 150 BAR / 2175 PSI 40 shots in .177, 35 shots in .22, 30 shots in .25 Accessory rail under forearm with built-in adjustable sling mount Includes 2 rotary magazines, 4 hex wrenches, and fill adapter