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A fix is in for the S&W AR-10 barrels
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02-25-2015, 07:32 PM
Drag
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Location: Dupage County, IL
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Quote:
Originally Posted by
sgtsandman
I'm unclear on the purpose of the pin. Does it fix the extension to the upper so it doesn't rotate?
Yes, the barrel extension (index) pin aligns it to the receiver.
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