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Posted: 2/25/2007 6:45:15 PM EDT
| How important is it to use moly grease on the upper receiver threads when installing a barrel nut? I didn't do it and found that the barrel nut...LT... was really tight when I made the final snug to line up the holes for the gas tube. I don't anticipate removing the the LT FF, but didn' want to screw up the upper either. |
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