4.2 Inch Mortar M30 US
The Canadian Army used the M30 Mortar with parachute and light batteries from 1955 until 1969. The M30 replaced the 4.2 Inch Smooth Bore (SB). Unlike the SB, the M30 had a rifled barrel, increasing its range and accuracy. However, the rounds were still muzzle loaded and needed to slide loosely to the bottom of …