Removing a AR-15 barrel extension

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    I was wondering how hard it was to remove and then reinstall a barrel extension nut on a AR-15 type rifle? I am not talking about the barrel nut but the barrel extension where the bolt locks up inside.

    I recently built a AR in 45 acp and it will shoot anything with a round nose without a hitch but will hang up from time to time with hollow points. I was able to get a borescope down the barrel and see where it hangs up and it looks like a little sanding and polishing will correct the problem, but I didn’t want to risk putting a drammel with a sanding drum through the barrel extension and possible damaging it so I was thinking of removing the extension. If any has any input it would be appreciated.

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