Vz58 side folding buffertube adaptor identification and discussion.

[Sevensixtwo]

I have a couple of side folding m4 buffertube adapters, both purchased used here on cgn. Both appear to be of the same manufacturer with some slight differences. One has an actual buffertube screwed into it and the other is a single peice made to perform the function of a buffertube but is not in fact a buffer tube.
This is the one with the buffertube as you can see it is busted.