I recently got a Russian SKS that is missing the bayonet. A local pawn shop had the correct bayonet and related parts, but no mounting screw. Is there any place that sells little parts like the screws for an SKS? So far nothing has turned up in my searches.
If it is the ooooooold style Russian with the spring-loaded firing pin, congrats; otherwise, you would be safer with a spring-loaded pin OR with some EXTRA cleaning on the firing pin hole. The Yugos especially seem to get gunked up and invite the possibility of a slam-fire situation.