I see an ATI folder, which is not that great, folds yes, but is wobbly when open. There is a rubber buttpad on the folder most likely to extend length. The reciever mount scope rails are garbage. Also has an aftermarket gas piston cover. Most likely it is a non-D model due to the bayonet being on there, that makes it use a duckbill aftermarket, total garbage. Unless its the D model i sold a while back where i filed on a slot for the bayo to be attatched.
Looks cool, but really doesnt add to the functionality of an SKS. I used to have one with all these gizmos too. Eventually sold it for a nice standard m59....then i got the 858 in the end, which has all this funky looking stuff seen in this pic in a package that actually works well together.