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AR15.COM
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3/19/2009 12:09:50 PM EDT
I know it's probably somewhere in here but I searched and couldn't find it.  I have a RRA Car-4 Flattop.  I just bought a Aimpoint Comp M3.  What height mount will I need to co-witness the bottom 1/3 with it?  I am looking at burris extreme tactical mounts.  My options are 1/4,1/2,3/4, and 1 inch heights. I know I need a 30mm ring but I mean the height of the mount.
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