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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
AR10 barrel nut problem
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<blockquote data-quote="C-130 Dude" data-source="post: 3098991" data-attributes="member: 122991"><p>There is a standard for the AR15. It follows the M16 and M4. If this is a large frame, all bets are off. I cant tell you how many fitment issues I had when I built my first AR10. Ouch! No matter. My guess is that since you stated the CMMG upper did fit with very minimal filing, it's possible the issue is a very small bit of excess metal in the mold design or machining program. If your upper is Cerakoted, then they probably didn't allow enough clearance allowing for the thicker coating. I have seen this happen on other parts. Coatings reduce clearences. Make parts fit tighter. An example being bolt carriers. Chromed ones are very picky about this issue. Stay safe and have fun.</p></blockquote><p></p>
[QUOTE="C-130 Dude, post: 3098991, member: 122991"] There is a standard for the AR15. It follows the M16 and M4. If this is a large frame, all bets are off. I cant tell you how many fitment issues I had when I built my first AR10. Ouch! No matter. My guess is that since you stated the CMMG upper did fit with very minimal filing, it's possible the issue is a very small bit of excess metal in the mold design or machining program. If your upper is Cerakoted, then they probably didn't allow enough clearance allowing for the thicker coating. I have seen this happen on other parts. Coatings reduce clearences. Make parts fit tighter. An example being bolt carriers. Chromed ones are very picky about this issue. Stay safe and have fun. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
AR10 barrel nut problem
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