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it won't fit, whole different set up.

I suppose a real clever machinist could find a way to make the SG43 have an adjustable barrel lock, right now its got no adjustment.

My $.02 headspace not super critical on these. They headspace off the case rim, 5 thou loose isn't going to hurt anything. I welded up my SG43 on the loose side, have no problems. NOTE - I do not reload. Might not be true if using brass reloadable ammo.
 

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Discussion Starter #3
Thanks Karl_T for the conformation that a PKM barrel lock will not fit a SG-43. Yes, I recently finished a KGK build and the headspace ended up +0.020 greater than the Go gauge. That was not good, the primer blew out and the lower cartridge bulged. Rather than cutting and re-welding the receiver, I moved the barrel back about 0.015". Test firing soon... The SG-43 build is next on the list, my question was forward thinking of the problems I may have coming my way on that build. M89
 

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