The all-new, tactical, variable pump, BB/pellet rifle features new valve technology combining lower pumping force with higher velocities. Features include a full tactical rail on top with adjustable sights and side rails for accessories. The MK-177 is fed by a 5 shot pellet clip or choose the internal 300 BB magazine, conveniently located on the side. The newly designed bolt handle is larger and located on left side for ease of use. Store ammo in the handy space beneath the rubber shoulder friction pad.