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Old December 6, 2012, 03:54 AM   #3
scsov509
Senior Member
 
Join Date: November 22, 2006
Posts: 819
I've tightened up wobbly handguards before by wrapping Teflon tape around the barrel nut. It's got a high heat resistance, is not adhesive, and you can wrap it slowly until you get your desired level of tightness on the handguard.
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