PICATINNY ARSENAL, N.J. - While most people think of paintball guns as fun and games, ... .68 caliber projectiles filled with paint and bismuth. ...

The vaguely named VKS is a paintball gun that bears a strong similarity to the Army’s M4A1 carbine weapons, ... It does not shoot 5.56-millimeter bullets but rather .68 caliber balls.

Real Action Paintball's T68 SplitFire Dual Feed Paintball Marker features a dual-source ammunition feeding system capable of providing two types of .68 caliber ammunition at the turn of a dial.