It is their old (1989?) Sherman that they mistakenly marketed as the M4A2 "Jumbo". It was a pretty decent M4A3 though. They also reissued it with the calliope rocket launchers around 1996. This latest reissue adds wooden armor, wading trunks and a corrected engine deck, but purists argue that the rear portion of the hull is not proper for an M4A2. Still, without the add-ons, it is a decent M4A3.
Build it with the wooden armor and wading trunks, and it looks enough like a Pacific theater Sherman for the casual builder.
This hull has some mileage since it was also used for their M36B1 Jackson, issued at the same time as the M4A2 Jumbo kit. The lower hull and running gear are the same as the ones that come with the original M4A1, M7 Priest, M32 TRV, and Kangaroo.