Hatsan 25 Supercharger air pistol Gas-piston Breakbarrel 58 lbs. cocking effort TruGlo fiber optic front sight adjustable for elevation TruGlo fiber optic rear sight adjustable for windage & elevation Quattro 2-stage adjustable match trigger Anti-beartrap mechanism Ergonomically designed synthetic stock Textured grips with finger grooves and thumbrest (RH grip) Manual/automatic safety Gold-plated trigger blade 11mm optics dovetail grooves Muzzle cap can be replaced by included aluminum cocking aid (both screw on) Here are the benefits of a gas-piston over a spring-piston powerplant: Smoother cocking Smoother shooting No spring torque No spring fatigue, even if you leave it cocked for hours Functions perfectly in cold weather Lasts longer than a metal spring Model 25 Supercharger Vortex pistol 0.177 700