First of all the photos are way too small to really make any determination. If you have better photos please post them.
Looks to me like you have a partial Galil parts kit rebuilt on a Saiga receiver. Why do I say this?
- Camming pin has been removed from the receiver, and camming pin hole appears to be welded up. This pin would normally be installed just behind the rear-most of the two top rivets on the left hand side. Looks like they may have installed a normal AKM bullet guide that included the bolt camming ramp, requiring the camming pin to be eliminated. Either way, the pin is gone and looks welded up.
- Bolt looks to be either Yugoslavian or Israeli. Unfortunately this means that someone modified either the bolt locking lugs, or the trunnion locking lugs to get this bolt to lock up in the original trunnion, as this is an AKM-spec bolt and is NOT compatible with the Saiga trunnion without modification of either locking surface
- Not enough photos of the carrier to determine its origin, but the "10" on the left side is NOT typical of Izhmash, so I suspect you have a genuine Galil carrier. The original Saiga carrier would not have even allowed the AKM spec bolt to be inserted into the carrier, nor would it have the proper camming geometry machined into the carrier to assist the bolt's rotation into lockup position. I suppose someone with enough skill could modify the original carrier, but I doubt that's what happened.
Sorry but I think you have a real mutt on your hands. It may be salvageable. Given that the bolt is not original, the headspace may indeed be too loose. The good news is that you can always get another bolt and start again, and you should be able to work with surplus 5.56 bolts for Yugo/Zastava, Galil, or late-model Bulgarian 5.56 rifles.
You probably won't be able to get a Saiga or AK-74 bolt to work in the rifle again. If the locking lugs were modified to lock on an AKM bolt, they are now way too small to headspace with any AK-74 spec, bolt such as the original Saiga bolt. You're most likely now stuck with AKM-spec 5.56 bolts.
If you could, please get some more photos of the bolt carrier, and of the front trunnion and locking lugs.
What's your location? Maybe someone here is near and could help out.
Edited by mancat, 29 July 2015 - 11:53 AM.