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The turret armor of the 75 mm and 105 mm armed M4 ranged from 25.4 mm (1.00 in) to 76.2 mm (3.00 in) thick. [104] The turret front armor was 76.2 mm thick, angled at 30 degrees from the vertical, giving an effective thickness of 87.9 mm (3.46 in).
M2 75 mm gun as mounted in medium tank M3. The 75 mm tank gun has its origins in the January 1937 specification for a light anti-aircraft gun T6 which would have supplemented heavy 3-inch guns and used the same range of 75x350R ammunition as the 75 mm field gun M1897. After the gun, which featured a 31-caliber barrel and a sliding block breech ...
The US version in British service was the Lee (named after General Lee); the British specification version (a different turret) was the Grant (named after General Grant). M4 = Medium M4 Sherman with 75 mm M3 (L/38) gun; M4 (76) = Medium M4 Sherman with 76 mm M1-series gun; M4 (105) = Medium M4 Sherman with 105 mm howitzer
Sherman Gun Tractor – British field conversion in Italy by removing turrets from M4A2 Sherman III tanks to tow 17 pdr AT gun and carry crew with ammunition. Some of the removed 75mm M3 guns may have been used for the Churchill NA75 field conversions unique to the Italian campaign .
By August 1943, the M4 tank armed with the 76 mm gun in the modified T23 turret was finally ready for production. A proposal was made by the Armored Force for a test run of 1,000 tanks for combat trials and, if that was successful, then devoting all M4 tank manufacturing capacity to those armed with the 76 mm gun. [2]
The M1 ammo crate held a total of 1,000 belted or linked rounds packed in 4 M1 ammo boxes and the later M1A1 ammo crate held a total of 1,000 belted or 1,100 linked rounds packed in M1A1 ammo boxes. There were two .50 M2 ammo boxes to a crate (for a total of 220 belted or 210 linked rounds) with a volume of 0.93 cubic feet.
After 1945, many were remanufactured and sent to ETO to make up shortages due to 1944 losses of M4 Mediums. M4A3(75)W – M4A3 with 75mm M3 gun. 47° glacis with large drivers' hatches. Shifted ammunition lockers to hull floor in water-glycol jacketed lockers to decrease risk of fire, known as "wet stowage".
The 75 mm gun is mounted on an early-pattern rotator M34 gun mount. Bomb does not have the later M34A1 with characteristic ears on the sides of the barrel. The gun-mount bolts are exposed, not protected behind the outer edges of mount. It is the so-called low turret bustle. There is a pistol port and door on the left side of turret.