Geissele MK14 13in vs. 15in on Colt Canada 15.7in barrel?

Mathforum

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Hi all,

I recently purchased my first AR15 (a Colt Canada SA15.7) and I am considering installing a free floating rail on it.

The rail I am interested in is the Geissele MK14 in DDC. However, I am wondering about the correct length to purchase. Anyone has either the 13 or 15 inches rail on the 15.7 CC barrel? My fear is that the 15in rail would be too long and cover part of the muzzle device.

Any input and opinions are welcome!

Thanks,

Matt
 
The 15 inch rail will cover the entire barrel and its threads and hide some if not all of your muzzle device. I suggest 13 inches.
 
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