CAMD RF 38-11355-806
"To the deputy commander of the Red Army GAU, Major-General of Artillery, comrade Hohlov
Experience shows that the 7.62 mm DT tank machinegun does not provide sufficient volume of fire, due to its 63 round magazine and rapid heating of the barrel. It is desirable to have a belt-fed machinegun, capable of rapidly firing up to 500 rounds.
The PPSh submachinegun is a necessary weapon for tank crews, but is inconvenient to use. The disk magazine is large, and gets in the way. The stock impedes exiting the tank. It is desirable to have a submachinegun with a box magazine that holds 25-30 rounds and a folding stock, like the one on the German SMG.
I ask you to instruct Artkom to begin work on improving firearms for tank crews according to the issues noted above.
Deputy GABTU Chief, Major-General of Technical Forces, Lebedev
BTU Military Commissar, Regimental Commissar Vorobyev"