Korean War USA 75mm M31A1 Recoilless Rifle Shell Case Cartridge 1953

M31A1 brass shell casing for the T21/M20 75mm recoilless rifle from the Korean War 1953. 16" tall 4.25" diameter.

M20 Recoilless Rifle 75mm M31A1 Shell Casings Dated 1953 (16 Tall): The M20 recoilless rifle is a U. 75 mm caliber recoilless rifle T21E12 that was used during the last months of the Second World War and extensively during the Korean War.

It could be fired from an M1917A1. 30 caliber machine gun tripod, or from a vehicle mount, typically a Jeep. Its shaped charge warhead, also known as HEAT, was capable of penetrating 100 mm of armor. Although the weapon proved ineffective against the T-34 tank during the Korean War and most other tanks, it was used primarily as a close infantry support weapon to engage all types of targets including infantry and lightly armored vehicles. The M20 proved useful against pillboxes and other types of field fortifications.