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Posted: 9/5/2016 2:51:16 PM EDT
| The standard barrel nut i am using on my aero upper is not threading normally. When i put it on and start to twist it by hand it stops after on rotation then I can't even get it to go on any further with putting a wrench to it so i stopped. In past builds the barrel nut would just go on freely. Any ideas. Upper threads or barrel nut? Could the upper receiver be twisted on the threads? |
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