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Old December 10, 2017, 19:29   #4
Low Speed, High Drag
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FALaholic #: 4827
Join Date: Nov 2001
Location: North Carolina
Posts: 950
If I understand this, the jam nut usually tightens against the hand guard, not the receiver. The barrel nut is torqued to the receiver, holding the barrel in place, and ultimately kept from un-threading by the gas tube.
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