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Old July 15, 2017, 17:34   #24
Arrogant Bastard
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Join Date: Jul 2000
Location: Surprise, AZ
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In pondering this a bit more - I don't have a specific way of doing it right now, but my thought is, a spring loaded plunger that introduces a mag catch block when the upper and lower are together. Break the upper open and the pin pops up, unblocking the mag catch.
T. Mark Graham, Master Gunsmith
Arizona Response Systems, LLC
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