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Frank's Lesson's Contest
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I know Brownells sells the tool to lap the upper receiver face for the AR15, but what about one for the AR10 style uppers. Didn't see one at Brownells.... Maybe just missed it. Recommended sources?? Thanks.
If you lap or true the seating face it will change the head space, is the seating faces square to each other & square to the bore. None of this will help if the receiver threads & the barrel nut are not square to each other, or the other parts. what will you do now.