"The first myth that is repeated by the film industry in particular is that the Red Army went into battle with one rifle for every 3, 5, even 10 men, fill in the blank yourself. This myth maintains that in the USSR, near Moscow, militiamen with one rifle per 10 had to stop German tanks, even though that is madness, that is not possible. The Red Army never had big problems, specifically big problems, with small arms. This was because there were large stockpiles from the Tsarist army and then the trophies from the Polish campaign. You'll laugh, but the source of this myth is the German Volkssturm. They really had one rifle with one clip of ammunition per 3 or 5 men. In the Red Army, in the worst case scenario, had its auxiliary troops go unarmed: drivers or artillerymen that fire guns from the rear at map squares. They don't really need a rifle. When there was not enough guns, such as in the summer of 1941, the guns were taken from these rear line units, from the horse handlers and such. On the front line the troops were armed well. The claim that soldiers would go into battle and would have to find a weapon there is nonsense. This is a very resilient myth. There are scarier things in war than having to go into battle to get a rifle, but this myth persists. "
Aleksey Isayev: Myths of the Great Patriotic War