Wear of Rifles branch of service insignia

[CtahhR]

So this would mean VV of the NKVD/MVD would wear the insignia but NKGB/MGB/KGB would not?

[Slobo]

Even NKVD Frontier troops? When did this regulation change? I've seen a number of green service officer shoulder boards purportedly of M43/WW2 vintage without arm of service badge or any evidence that one had been there. This could help date these if wear of the crossed rifles was compulsory and widely obeyed.

[kliment]

Originally Posted by CtahhR

So this would mean VV of the NKVD/MVD would wear the insignia but NKGB/MGB/KGB would not?

Yes for the '43 regulations. See here:http://rkka.ru/uniform/terms/pogony_nkvd2.htm

For nco's and ranks the numbers on the shoulderboards disappears in 1947 (see attachment). May be it's the same for the officers' arm of service badge? But I can't be affirmative.
In '52 regulations: no insignias.