Americans didn't have a decent infantry weapon after WWII until M-16. With M-14 they repeated a Soviet experience with SVT/AVT-40...
AVT-40 had to be used only as semiauto, due to low accuracy, high ammo consumption and low barrel endurance.
SVT was much cheaper and easy to manufacture then 1891/1930 Mosin three-line rifle, but it was abandoned and Mosin rifle was still manufactured in million quantities.
At the same time my Father, who was a Navy cadet since 1943 was in an "istrebitel'niy batallion" in Yaroslavl' where their college was evacuated, and had a rusty Arisaka rifle imported during WWI. It was not blued and turned rusty in the evening after being cleaned and oiled in the morning...
Russian army was the first to have an Automat, close to a concept of StG or Kalashnikov. Fedorov's automat was adopted in 1916 and used Arisaka 6.5mm cartridge. It was signed off duty in 1927 in favour of (surprise! surprise!) Mosin's 1891 bolt action rifle, Dragoon version...

We have a similar discussion in our Russian forum, and one guy brought a link:
http://vif2ne.ru/nvk/forum/0/archive/697/697651.htmGuards Rifle regiment was supposed to have 1008 bolt-action 1891/1930 rifles, 344 PPSh submachine guns and 788 SVTs. It's surprising: the regulation was issued in 1943 when SVT was officially not manufactured.
To Aper: Миша, ты на дев-лист до сих пор подписан? Говорят ты сейчас в Австралии? Давненько мы не виделись... Эстель вот в аську стучится, говорит давно мы глинтвейну не пили...