New to this and decided to try to use this rail I found in my deceased brothers collection. I can't ask him where he got it. There are no markings on it and I have done hours upon hours of internet searching. Definitely more than I should have. Closet thing that might work is the BCM KMR barrel nut from Bravo. Any help would be greatly appreciated. I attached a link to the images I put on Imgur. Hopefully this works.
http://imgur.com/a/X9jTysR