Air Arms S500XS Xtra FAC sidelever air rifle Precharged pneumatic Fully Regulated Sidelever cocking Single-shot 5-position Transfer Port Power Adjuster 2-stage adjustable trigger Adjustable power 11mm scope grooves (no open sights) 3625 psi fill pressure (250 bar) 288cc tank Built-in manometer (air pressure gauge) Lothar Walther barrel Shrouded barrel for extra-quiet shooting Ambidextrous Monte Carlo poplar stock Dual raised cheekpieces Checkered pistol grip and forearm 60 shots in .177, 55 shots in .22 Ventilated rubber buttpad Our specs show that this rifle has a 19.45" barrel. The shroud is much longer, and the exterior length from the action to the muzzle measures 24". The barrel is only the rifled portion of the gun.