Abstract: A device in a paintball gun includes a main body extended longitudinally and along a first axial line and including a plurality of air passages and an air channel. The plurality of air passages are circumferentially disposed and each are extended obliquely and have a first end defining an opening on an outer periphery of the main body and a second end extended to the air channel. Air flowing in the paintball gun is directed through the plurality of air passages into the device, and vortices are generated in the air channel to impart a spin to the paintball being launched.