By Christ mightyjebus, that looks like an insurgent stockpile! Especially with that numbering painted on the stock of the one at the top. I'm bloody jealous!
As a side note it's brilliant seeing all these people doing Bizon conversions of late.
Well.. If you could answer a couple of questions I'd be very grateful, where did you get the stock from and to your knowledge is it possible to attach the folding mechanism as well to retain the function?
Great looking weapon there, how did you attach that folding stock to it, and does it still fold?
I'd guess it was according to the guide on Komanda Groza?