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Quote: Originally Posted by eternal24k filed Can we conclude that no upper and lower are exactly drop in? There is always the need most of the time to adjust the holes of the said rear takedown holes of the upper receivers.
Quote: Originally Posted by tonnete_r Can we conclude that no upper and lower are exactly drop in? There is always the need most of the time to adjust the holes of the said rear takedown holes of the upper receivers. IS this that common for .308s? I have never had to modify any of my 10 5.56 uppers