just because it is Soviet does not mean it is the same size. and you are exactly right,.. the trunnions are diffrent.
now when everyone was in the USSR a Russian stock would fit a Bulgarian rifle and vice versa,..these where all the 4.5mm type,...now the AK-100 series rifles,.. no one else has those except the Russians and are the 5.5mm type
yeah i would love a 5.56 Krink,.. i want to build one on a milled reciver with the AK-100 series butt stock.,..but i can not afford a post sample,.. but man that would be fun.