colt upper question

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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

Posted: 3/28/2009 12:25:23 PM EDT

[#1]

A new 6920 will have a standard size (.250") pivot pin hole.

Posted: 3/28/2009 12:25:57 PM EDT

[#2]

Quoted:
A new 6920 will have a standard size (.250") pivot pin hole.

This

Posted: 3/28/2009 12:29:57 PM EDT

[#3]

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):

Posted: 3/28/2009 12:39:55 PM EDT

[#4]

Nice looking smoke poles! Thanks for the info. I am psyched

Posted: 3/28/2009 1:02:12 PM EDT

[#5]

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.

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