Quote:
Originally Posted by caboose36
A: The O-ring around the barrel kept getting chewed up by the barrel nut and having to be replaced.
B: After fitting it, and after a couple mags the barrel nut would loosen up enough to make the outer barrel move very much freely..
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I had the same issues with mine. For the o-ring I used a fair amount of silicone grease to keep it from binding/tearing. In respect to the barrel nut you might want to consider using a couple rounds of teflon tape to remove the excess play.