A variant of the M4 Sherman was armed with the 105 mm M4 howitzer, which provided even more powerful high-explosive armament. This variant was employed in six-vehicle "Assault Gun" platoons in armored battalions to provide close fire support and smoke. The 105mm-armed variants were of limited use against enemy tanks due to the poor anti-armor performance of the howitzer, which was not intended to fight other tanks, though a High Explosive Anti-Tank (HEAT) round for the 105 mm howitzer was available for self-defense. 另外装备的HEAT弹M67的穿深似乎是0度,102mm