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AR15.COM
2/15/2015 7:09:57 PM EDT
If I cut down a A2 front sight base on my BCM 20", will a KMR fit over it?  Or must I get a lo-pro gas block to use a KMR?

Thanks
2/16/2015 12:01:42 AM EDT
[#1]
I've read reports that it works fine.  No firsthand experience though.
2/16/2015 12:05:44 AM EDT
[#2]
With a 20" barrel you have a rifle length gas system, you'll need a long rail to cover it completely.
If you cut a A2 front sight base down right, it Will fit under a KMR rail. You don't need a lo-pro gas block, if you do a good job, Take your time.
2/16/2015 12:22:45 AM EDT
[#3]
Thanks guys.  BCM is out of stock on 15" rails.  Do you know if these are particularly hard to find in stock?
2/21/2015 8:09:53 PM EDT
[#4]
I didn't notice them being out of stock frequently when I was looking at them a month or two ago.  I noticed a lot of places don't carry the 15 incher.