Those crazy Ukrainians took a T-72, lengthened the hull, and turned it into a sort of 5-man heavy infantry fighting vehicle, retaining the 125mm gun and missile armament.
Linka
Diagram, you can see the new hatches for the troops
Close up of new hatches
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Oh my god, they did it with a T-80 too!
Linka to the BTMP-84
The BTMP-84 is based on the chassis of the T-84 main battle tank. This retains the two-person turret armed with a 125mm gun fed by an automatic loader.
The specific feature of the vehicle design is that there is a troop compartment for five infantry soldiers.
A door at the rear of the vehicle opens to the left, steps fold downwards and the hatch above this is raised to allow the troops to rapidly leave the vehicle.
A firing port is provided in either side of the troop compartment, as are roof hatches.
The Ukranian BMT-72 - Insanity.
Threaded Mode