That is a faked bayonet. It's an M44/T53 milled to fit a straight eared collar...ask me how I know.
There should not be the visible air betwixt the collar and the bayonet. A real Russian SKS spike has a bit of a heel that closes that gap and is slightly visible when installed.
It
DOES however have the correct stock retaining ferrule....and it's sexy bottomed pinned self. That shows it's a 49...or earlier.
The stock may be correct...those things generally look so funky it's hard to say if it was whittled down.
The reason the bayonet doesn't close the gap could be due to a modified regular hardwood stock....something about the grip area seems a bit off.....but like I said, they are generally funky.
That is certainly one of those later loop takedown levers...which isn't correct, but at refurb might have been WHAT they made for refurbs with the early RC differences...when they were more populous in the general fray of what they had. A stamped version would be easier, and identifiable for the guy at the bench. (speculatin').