Air Arms S510 Xtra FAC sidelever air rifle Precharged pneumatic Sidelever 10-shot repeater 2-stage adjustable trigger Adjustable power 11mm scope grooves (no open sights) 2900 psi fill pressure (200 bar) Built-in manometer (air pressure gauge) 231cc air tank Lothar Walther barrel Shrouded barrel for extra-quiet shooting Beech or walnut stock Checkered pistol grip and forearm Superbly blued Magnificent stock finish Ventilated rubber buttpad