Field strip it and see what the slide, bolt, and trigger housing is marked. You'll also be able to see what the hammer is marked as well. If you're ever down Lexington NC way I'd be glad to show you how to take apart the trigger housing to check the trigger and sear, and I have a tool to strip the bolt so you can check the extractor and firing pin for marks. I'm going to be at the Greensboro show this weekend in case you come down. Hoping to be in the middle room, left wall, and will have the bolt tool with me if you want to bring it along. You can check out the carbines I have to sell as well.
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