Posted: 8/6/2014 7:44:14 PM EDT
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Hi, I was wondering if anyone has used the Mk3 upper on an 80% arms lower receiver. I was told by Jeff at 80% arms that the CMMG uppers fit much better than the DPMS uppers on their receivers. If CMMG or anybody else has first hand experience with this, the info would be greatly appreciated.
Thanks, Curt |