Air Arms S510 XS Xtra FAC, Regulated, sidelever air rifle Precharged pneumatic Sidelever cocking Fully Regulated 10-shot repeater 2-stage adjustable trigger 5 position adjustable power 11mm scope grooves (no open sights) 3,625 psi fill pressure (250 bar) Built-in manometer (air pressure gauge) 288cc air tank Lothar Walther barrel Shrouded barrel for extra-quiet shooting Ambidextrous Monte Carlo poplar stock Dual raised cheekpieces Checkered pistol grip and forearm Superbly blued Magnificent stock finish Ventilated rubber buttpad