Attached them to my AR MOD 1.Only issue I had was O-ring for eyepiece was wrong size. Cover rolled to one side or the other when open. Contacted Leupold and they told me there are several O-rings for the eyepiece. Just so happens the one that shipped doesn't fit mine. They were more than happy to send me a couple sizes, so I can find the one that fits correctly.
Pros: Leupold quality
This review was written in the old system and had content requirements that are different than reviews written today.