I presume this is the correct area for such a question. I just got a new Bulgy Arsenal Milled Receiver SAM-7 and though I haven't taken it to my range yet (it's closed during deer season), I always itch for redundancies in parts as well as ammo and mags. Though the likelihood of failure is ridiculously remote, I'd like to have a spare bolt, carrier and piston, to go with some of the more obvious failure parts. Because the Bulgy closely follows the Russian pattern and tolerances, am I limited to Russky or Bulgy parts, or can I reasonably assume AKM assemblies like East German, Hungarian or Polish will suffice ? Your thoughts would be appreciated.