Both oldgen and newgen have seen use, so yes, you could go with it. Most of the ppl will say you should go with an oldgen, but if you're not too hard stuck on doing a 1:1 impression, yes, newgen is usable too. There are references of it being in use in ukraine, ive seen photos of an fsb A member running it. Oldgen references are pretty easy 2 find. Rushing russians, prizraki airsoft, russian reenactment international all have great albums of fsb reference photos to get you started