Editing M4 Sherman (section)

===Turret===
The turret armor of the 75&nbsp;mm and 105&nbsp;mm armed M4 ranged from {{convert|25.4|mm|in|abbr=on}} to {{convert|76.2|mm|in|abbr=on}} thick.{{sfn|Zaloga|1993|p=14}} The turret front armor was 76.2&nbsp;mm thick, angled at 30 degrees from the vertical, giving an effective thickness of {{convert|87.9|mm|in|abbr=on}}. The opening in the front of the M4's turret for the main gun was covered by a rounded {{convert|50.8|mm|in|abbr=on}} thick rotor shield. Early Shermans that had a periscopic sight for the main gun mounted in the turret roof possessed a small {{convert|76.2|mm|in|abbr=on}} thick mantlet that only covered the hole where the main gun barrel protruded; the exposed barrel of the coaxial machine gun was vulnerable to bullet splash or shrapnel and a small armored cover was manufactured to protect it. When the Sherman was later fitted with a telescopic sight next to the main gun, a larger {{convert|76.2|mm|in|abbr=on}} thick gun mantlet that covered the entire rotor shield including the sight and coaxial machine gun barrel was produced.{{sfn|Zaloga|1993|p=14}}{{sfn|Reid|2005|p=215}} 105&nbsp;mm-armed Sherman tanks did not have a rotor shield, possessing only the mantlet to cover the opening in the turret front. The turret side armor was {{convert|50.8|mm|in|abbr=on}} thick at a 5-degree angle from the vertical.{{sfn|Reid|2005|p=215}} The turret rear armor was {{convert|50.8|mm|in|abbr=on}} thick and vertical, while the turret roof armor was {{convert|25.4|mm|in|abbr=on}} thick, and flat.{{sfn|Hart|2007|p=27}}

Later models of the M4A1, M4A2 and M4A3 Sherman tanks were equipped with the [[T23 series|T80 turret developed for the T23 tank]] and the new 76&nbsp;mm gun. This turret's armor was {{convert|63.5|mm|in|abbr=on}} thick on the sides and rear, angled from 0 to 13 degrees from the vertical. It had a {{convert|25.4|mm|in|abbr=on}} thick roof, which sat at 0 to 45 degrees from the vertical.{{sfn|Conners, ''Medium Tank M4A1 Sherman'' (2013)}} The front of the T23 turret, which like the 105&nbsp;mm-armed Sherman's turret, did not have a rotor shield, was protected by an unsloped {{convert|88.9|mm|in|abbr=on}} thick cast gun mantlet. Combat experience indicated that the single hatch in the three-man 75&nbsp;mm gun turret was inadequate for timely evacuation, so Ordnance added a loader's hatch beside the commander's beginning in late 1943. All 76&nbsp;mm gun turrets had two roof hatches.