Works great to raise the optics to for proper sight alignment. I have multiple IMS mounts in both the 30mm and the 1" sizes for my AR platforms. These mounts are well built and do a great job of holding zero while allowing you to quickly remove and reattach your IMS mount and optics to your rifle. I always test fire and ensure my zero is still close before I do any long range shooting or hunting. This mount has maintained my zero closer than any other mount thatI have used (or used to own). I use this on 7.62 x 51 rifle, a 300 AAC blackout, and on multiple 5.56 set ups. I also use the same mount on my service rifle. I have been a US Army Infantryman for 24 years, so I have seen many different mounts. The Leupold II IMS is the best that I have found.
Pros: Well built, quality materials, light weight
Cons: A little pricy and sometimes hard to find in stock
This review was written in the old system and had content requirements that are different than reviews written today.