Nitro Piston Short Stroke rifle Breakbarrel Gas piston Shrouded barrel 11mm dovetail grooves Ambidextrous cheekpieces Includes unmounted CenterPoint Optics 3-9x40AO scope 2-stage adjustable trigger Reduced vibration due to the gas piston & the special carbon-fiber stock Much quieter than other breakbarrels Here are the benefits of the Nitro Piston: 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