Black Ops Tactical Sniper Air Rifle Gas-piston Breakbarrel Single-shot Rifled steel barrel Muzzlebrake for extra cocking leverage Weaver/Picatinny optics rail Includes adjustable fiber optic sights Adjustable comb Synthetic stock Automatic safety 44 lbs. cocking effort 44 inches long Bipod legs extend from 8" to 10" Bipod legs fold up out of the way Includes 4x32 scope (unmounted), mount and adjustable bipod attached to forearm Benefits of a gas-piston powerplant over a metal mainspring: Smoother cocking Smoother shooting No spring torque No spring fatigue, even if left cocked for hours Functions perfectly in cold weather Lasts longer than a metal spring The manufacturer claims this gun delivers .20-inch groups (center-to-center) at 10 meters. This is a breakbarrel air rifle, but the manufacturer has installed a bolt to give this air gun a more authentic tactical look. The bolt is non-functional.