In 1944, GAZ produced a variant of the BA-64B mounting a single 12.7mm DShK heavy machine gun in a larger turret.[1] Although this greatly improved the vehicle's firepower, the turret remained insufficient to adequately rotate the bulky machine gun, and there was not enough space in the hull to accommodate adequate 12.7mm ammunition stowage.[2] Only a small number were manufactured.[5] Another unusual variant, the BA-64ZhD, was produced using surplus, old BA-64 hulls, albeit mounted on the GAZ-67 chassis.[2] It possessed flanged, steel rail wheels which allowed it to patrol railroad tracks.[5]