Hi Paul, the Grants are Mirage but on the second pic of the unpainted one you can just see a corner of white plastic I drilled & trim my hatch out & made a new one
same with the front hatch I drilled & cut a rectangular window & fixed the hatch open I also used some foil & made the dust cover.
thanks I have a S-Models A13 & Dan Taylor Desert conversion & PSC A9 & Dan taylor conversion set
waiting for a Dan Taylor Alamein Sherman II conversion for a Heller M4
Mirage Hobbies store has the 72670 kit ( & the 72673 kit if you wanted a Round turret too)