A non-lethal, light weight, paint ball weapon is attached to standard rifles and fits underneath the barrel of the rifle on existing hard points provided for M-203 forty millimeter grenade launchers. A separate triggering system allows the shooter to fire the non-lethal weapon while aligning sights upon an intended target. The paint ball is stabilized by a first immiscible high density component filling approximately one-third of the ball interior volume. Paint or some other liquid is used as a lower density component filling the remaining volume. The high density component may be talc powder, lead shot, sand, glass beads, or a high density substantially immiscible liquid, paste or gel. The specially adapted, stabilized paint ball includes a colorant or dye and, optionally, a skin irritant or odor producing liquid. The ball is enclosed by an elastomeric, fluid impermeable skin scored or marked to ensure immediate bursting and kinetic energy dissipation upon impact. The ball may be filled with a any of a plurality of liquids, thereby providing a baton-marker round, a chemical incapacitating (e.g., oleoresin capsicum) round, a transdermal drug delivery round, a water-filled training round, or an infrared or ultraviolet tagging round. The paint ball ammunition may be color coded for easy identification of the contents and intended use. The weapon fires a selection of paint ball types and includes a plurality of magazines marked with external indicia of ammunition type, or the magazine tubes may include a window, allowing the paint ball condition and color coding to be seen.