I have the Burris XTR rings on 2 ARs. I like them & all is well. I know it's a little different(higher) than we're used to with bolt rifles but high is the norm. You also have to get at the charging handle. I have the extra high, or whatever is highest, the last 3 is 183 on the product number. Natchez had a pretty good price on them a while ago.
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