M2 4.2-inch mortar

The M2 4.2-inch mortar was a U.S. rifled 4.2-inch (107 mm) mortar used during the Second World War and the Korean War. It entered service in 1943. It was nicknamed the "Goon Gun" (from its large bullet-shaped shells, monopod, and rifled bore – like a rifle for shooting Goons) or the "Four-Deuce" (from its bore size in inches). In 1951 it began to be phased out in favor of the M30 mortar of the same caliber.

M2 4.2-inch mortar

The M2 4.2-inch mortar was a U.S. rifled 4.2-inch (107 mm) mortar used during the Second World War and the Korean War. It entered service in 1943. It was nicknamed the "Goon Gun" (from its large bullet-shaped shells, monopod, and rifled bore – like a rifle for shooting Goons) or the "Four-Deuce" (from its bore size in inches). In 1951 it began to be phased out in favor of the M30 mortar of the same caliber.