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Posted: 3/28/2009 12:21:23 PM EDT
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?
Thanks
Link Posted: 3/28/2009 12:25:23 PM EDT
A new 6920 will have a standard size (.250") pivot pin hole.
Link Posted: 3/28/2009 12:25:57 PM EDT
Originally Posted By MMcfpd:
A new 6920 will have a standard size (.250") pivot pin hole.


This
Link Posted: 3/28/2009 12:29:57 PM EDT
[Last Edit: 3/28/2009 12:36:41 PM EDT by CJan_NH]
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 :)

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ETA: Here are two of them-RRA lowers with LE6920 uppers:


Here's another one (bottom rifle):
Link Posted: 3/28/2009 12:39:55 PM EDT
Nice looking smoke poles! Thanks for the info. I am psyched
Link Posted: 3/28/2009 1:02:12 PM EDT
[Last Edit: 3/28/2009 1:06:52 PM EDT by CJan_NH]
Originally Posted By etgman:
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.

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