UMAREX Octane Air Rifle Kit, Gas Piston

Umarex Octane air rifle kit ReAxis gas-piston Breakbarrel Single-shot Rifled steel barrel with SilencAIR integral silencer 2-stage adj. trigger 3.50 lbs. trigger-pull Fiber-optic sights (fully adj. rear) Picatinny optics rail Automatic safety Ambi synthetic thumbhole stock 14.25" length of pull Rubber recoil pad Grooved (ribbed) grip 42 lbs. cocking effort 3-year warranty 9.50 lbs. Includes unmounted 3-9x40 AO scope (10 yds to infinity parallax adjustment, duplex reticle), mount and barrel-clamp bipod
Here are the benefits of the Umarex ReAxis gas-piston over a coiled metal mainspring:
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