Abstract: A projectile launcher has a magazine of launching chambers for holding a plurality of projectiles at the launcher's front end. The projectiles are launchable by the delivery of a blast of compressed air through each chamber's respective air inlet. The air inlets are uniformly spaced in a substantially cylindrical array about the magazine. A piston with a handle is adjacent to the rear end of the launcher body. The piston has a longitudinal axis coaxial with the cylindrical array, and the piston is movable in back-stroke and fore-stroke motions along that axis for inhaling air into the launcher during the back-stroke and exhaling air from the launcher though one of said air inlets in blasts of compressed air during the fore-stroke. A rotatable diverter directs the blasts to one of the air inlets individually and sequentially upon successive backstroke and fore-stroke cycles of the piston.