I have a deposit on a masterpiece arms MAC 10 copy. The gun has a BB and welded barrel cover/brake. I'm hearing gun shop FUD that I can't put the stock mag release on after purchase. I've read the SSE sticky and it sounds like returning the gun to stock (minus the threaded barrel) is GTG. I have a few Sten mags that I can mod to fit the Masterpiece.
Thanks,
Peter
Thanks,
Peter

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