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Posted: 4/20/2016 1:39:52 AM EDT
I'm debating 16 vs 18 right now. I picked up a GMT-Halo and a 15" CMR rail. I'd like to have a 16" barrel but if it wont clear, I have no problem getting a 18".
Shouldn't be a problem. As mentioned, the 15'' handgaurd will leave all of the threads + half an inch or so of barrel exposed.
Excellent. Thanks for the help.
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