It is kit #6440, an M4A3 76MM, supposedly. I've read the turret and gun are all wrong and the tracks are junk. I've found the tracks, so that's easy enough. What needs to be corrected on the turret? I know the gun is shaped wrong and you can get those, but if the turret is all wrong I'd be better served to replace both.
Since the hull is all wrong for an early M4, I'll build the A3 and make the corrections that are most needed and find and early M4 kit and build that also.
BK
Edit, having read more I see the gun is misshaped and the hatch is a split type which is apparently largely not correct. Verlindin makes an M4A3 turret and gun. Is this the correct one for the M4A3 as they state?