Whether 40 mm sized table tennis ball spins more or less than 38 mm ?
The Milkor 37/38 mm Less Lethal “ Stopper ” Single - shot was designed and distributed in 1981 by Milkor ( Pty ) Ltd as a less - lethal anti-riot weapon along with the Milkor 40 mm Single shot Grenade Launcher which was designed as a reduced - cost grenade launcher for the SWAPOL Forces .