PT-1 RPK side folding stock.
This designed to fit RPK or Vepr rifles which already have side folding mechanism in them. This is a swap part. They are meant to replace factory tubular metal or a plastic (square looking) folders.
If you are not sure if this stock will fit your rifle or not, feel free to drop us a line ( http://www.akstuff.com/index.php?route=information/contact )