![Fedorov-Shpagin Model 1922 | Gun Wiki | Fandom] 
why
.soviets have enough guns
.they stole the jp’s round
.jp needs a br5 assaulter weapons
.jp could have bought or stolen some
.at least unlike the ho-ri it existed
.it would add more guns without bloating the soviet tech tree
The Fedorov avtomat as modified in 1922. It was a parent to a whole family of experimental small arms - a concept that was decades ahead of its time
Experimental 7,62x54R Fedorov self-loading and automatic rifles, produced for Red Army trials in 1926. Their design was based on the 6.5mm avtomat. These rifles proved to be unsatisfactory and soon were abandoned.
Test-firing 7.62mm Fedorov automatic (machine) rifle, 1926
my choice is the top pan fed soviets use jp round, jp use soviet magazine would also give long suffering jp a leg up. and the wide variety of fa could provide weapons from br2/3 to br5/6.