[ARCHIVED THREAD] - Question on rail system..

Posted: 2/17/2010 10:39:07 AM EDT

Which LaRue front rail will fit my Colt 6721? I have seen 7.0 and 11.0 and dont which will fit. Thanks

Posted: 2/17/2010 11:00:34 AM EDT

[#1]

You didn't specify in your OP, but if maintaining your FSB then you will need the 7.0. If using a low pro gas block then the 11.0 will work.

Posted: 2/17/2010 12:09:01 PM EDT

[#2]

What is FSB? Whatever kind of block comes on it I will be usin. Thanks

Posted: 2/17/2010 12:33:45 PM EDT

[#3]

Quoted:
What is FSB? Whatever kind of block comes on it I will be usin. Thanks

Front Sight Base. You need the 7.0.

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