I have a Madbull MK18 9.5"rail that does not line up with the receiver rail either. But the threads are precise and tough. Had the rail off many times and no sign of wear.
I run the Magpul flip up sights. If you like the stock triangle sights, there are triangle mounts for a rail as well.
Last edited by SuperHog; October 12th, 2011 at 16:10..
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