Hatsan Speedfeed Vortex Nitropiston .177 (4.5mm) Rifle

Vortex gas piston powerplant
Breakbarrel
Magazine RPM (Rapid Performance Mag): 12 shots in .177
Fluted steel barrel
Quattro 2-stage adjustable match trigger with metal trigger blade (adjustable for trigger pull weight, first stage, second stage, and length of travel)
Combo Scope mounting rail: 11mm dovetail and Picatinny rail
Flip-up TruGlo red fiber-optic front sight
Fully adjustable TruGlo green fiber-optic rear sight
Automatic safety
Ambidextrous synthetic stock
EZ-Load action system cocks and loads the pistol in a single motion
Includes Optima 3-9×40 scope with rings and 2 magazines
These are the benefits of a Vortex gas piston engine over a spring Wound metal mainspring:

Smoother cocking

Smoother shooting

No spring torque

No spring fatigue, even if you leave it cocked for hours.

Works perfectly in cold climates.

Lasts longer than a metal mainspring.