With 7 M4A3 variants which one will it be?
From Wiki (hate the site, but it's convenient):
# M4A3 - Ford GAA V-8 engine; welded hull; 75-mm, 76-mm, and 105-mm guns. Users: US, France (small numbers), Nicaragua (small numbers). The M4A3 was the preferred US Army vehicle.
* M4A3(75) - M4A3 w/
75mm M3 gun. * M4A3(105) - M4A3 w/
105mm M4 howitzer. * M4A3E2 Assault Tank - postwar nickname "Jumbo"/"Cobra King" - extra armour (including 4" on front), vertical sided turret, but about 3-4 mph slower. Built with 75 mm gun but frequently re-armed by the using units with
76-mm guns. Grousers fitted to the tracks. Users: US, France (one vehicle)
* M4A3E4/M4A3(76)W - M4A3 w/
76mm M1 gun.
* M4A3E8/M4A3(76)W HVSS (Easy Eight) - Upgraded with widetrack Horizontal Volute Spring Suspension (HVSS), fitted with the
76mm M1 gun. The new suspension allowed for more armor to be added.
* M4A3E9/M4A3(105) HVSS - Upgraded with widetrack Horizontal Volute Spring Suspension (HVSS), fitted with the
105mm M4 howitzer.
From front page:
M4A3
75mm.
So I'd have to guess the 75mm version.