M7A3 (ordnance part No. 7266167) [September, 1952 – 1961]: During the Korean War, it was found that World War II–era anti-tank grenades were useless against the Soviet T-34 tanks fielded by the North Korean Army. A new high-velocity anti-tank rifle grenade called the Mecar ENERGA (dubbed the M28 in US Army service) was soon issued. However, its grenade launcher (dubbed the T119) had the same problems as the original M7 launcher and the M28 was inaccurate when launched from the M7A2. The M7A2 launcher was simply redesigned with a longer tube to fire the improved grenades and could be used with either the "flat edge" or "high hump" lock. After the war (from early 1956 to late 1959), it could be fitted with a leaf-sight that was calibrated for use with the M28. The M7A3 kit (ordnance part No. 5750089) consisted of an M7A3 launcher packed with a "high hump" gas lock to allow the grenadier to upgrade an earlier model M1 Garand to the new specification.
New Production.
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