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 the barrel. Once fired, the shell expanded into the rifling, activating the spin that increased the M30’s range.
Before the Canadian Army began using the M30, American troops used it during the Korean War. Mortars worked well in the Korean theatre due to the rough terrain and challenges deploying weaponry. The US also used it during the Vietnam War.
Weight of Projectile: 22 to 27 pounds (10 kg to 12.3 kg)
Range: 7,480 yards (6,840 metres)
Rate of Fire: 3 rounds per minute