Funny about the Yugo thing, I have been struggling with a ex field expedient sniper, a early import I just bought recently, definite Bosnian origin due to small stamped import mark on barrel way back, and bases left on unlike recent imports, surprising well cared for bore and was in the grease and never shot by previous owner, someone up there mentioned a piece of metal, the trigger action was locked up, sear would be stuck down inside, apart from other problems associated with an obvious replacement rear firing pin assembly that looks shiny new. Seems when I took the action out of the stock a few pieces of brass fell out, cracked in three places(could have been an action spacer though cause there were other spacers in there at action and under barrel), and something that looked like a round piece of rod, I mean, whatever it was became broken and fell apart, and the trigger aint working right still, I'll probably have to remove it and put in a spare from something else, and it doesn't quite have perfect contact with the unissued cocking piece. That rifle had some cardboard or heavy gasket material shimming for accuracy
Them yugos, I mean, jeese! And I have globs of what appears to be plumbing silver solder, the acid core type obviously, laid haphazardly around the rear zrak base, and one big glob on the front base, I could do a better job, but maybe someone did it with a hot iron or something haphazard, I'll fight the urge to "improve" the solder job cause its original to the rifle and historic, I mean, the solder job looks like s.....
But anyway, I guess I didn't look it over right when I had it apart, it looked like any other mauser trigger sear, but something aint right, very confusing, probably a snipped and collapsed spring in the cup, maybe the dimensions have been changed with a torch cause the trigger is in a odd spot further to the rear than normal, just noticed that. Has a highly modified bolt handle too, a weld on replacement that looks like it was from a Yugo 24 carbine bolt, and they knotched the receiver, musta had a low slung scope, zrak bases, I got just the thing for it for scoping, has a pristine bore so I am gonna use a 4-12x40 scope for kicks when I try it out.
Somehow, the rear firing pin assembly that is obviously a replacement before it was greased up and stored, it won't allow the safety to work, just one big mess.