>>7442346It’s literally just a 12.7 mm DShK machine gun slightly modified and shoved into the turret.
The DShK could fire at 4000 m (2.49 mi) with HE-AP B-30 and B-32 incendiary rounds. This firepower enabled it to engage light tanks and armored cars (penetrating 16 mm/0.63 in of vertical armor from a distance of 300 m/330 yd), while the sloped frontal armor, 13 mm (0.51 in) at the thickest, could either stop or deflect heavy machine-gun rounds.
