Historical Note:

The SU-120 was a 120mm gun carrier, developed by USSR, it was effective at destroying an entire Panzerbattalion force, it was armed with a 120mm M7 Kuzujishiyanko Anti Tank gun, developed by Wright to counter the Japanese Invasion, the WSDF supplied about 1,355-9,126 of those, particularly the M7A1 variant, the Soviet experimented the AT gun by placing it in a T-16 Medium tank, which is essentially just a M32 Kozushise medium tank, modified to meet the Soviet standards, in doing so resulted the gun having its elevation reduced from -10°/+25° to -5°/+19°, because of this conversion, the Soviets created a SU-120, which was a turreted tank destroyer.

Info:

Main Gun: 120mm M7A1 Kuzujishiyanko

Coaxial MG: 30-06 M1919A4

Crew: 5 (Driver, Gunner, Commander, and 2 Loaders)

Shells: 120mm M160A1 (APHE), 120mm BR-725B (APHEBC), 120mm BR-725SP (APCR), 120mm M129 (HE), 120mm M129(TF) (HE-TF)