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Posted: 3/28/2009 12:21:23 PM EDT
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I am putting together my first lower - a Rock River and have begun the hunt for a 1 in 7 twist upper. Do the colt 6920 uppers have the large colt pivot pin. If so what is involved in the connection to the smaller set ups. Also any other 1 in 7 twist favorites out there?
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The LE6920 upper has standard small pins-Colt stopped using large pins quite a while ago. FWIW, I run several 6920 uppers on Rock River lowers and have had excellent luck with them :)
Posted Via AR15.Com Mobile ETA: Here are two of them-RRA lowers with LE6920 uppers: 
Here's another one (bottom rifle): 
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Quoted:
Nice looking smoke poles! Thanks for the info. I am psyched Excellent :) When it comes to building your own, Colt uppers on RRA lowers go together like peanut butter and jelly-a great combination. ETA: LMT makes a damn nice upper as well. I can't vouch for other brands-as I've only built my own with Colt, LMT, and RRA. Posted Via AR15.Com Mobile |
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