As with others who have reviewed this rider it did require a bit of filing on the inside track to fit my rail. Anyone w/a file and a few minutes can do it. After that it fits and loods great. A pair of them is cheaper than a decent set of tall rings to get a scope up to eye level on my AR15. I would recommend this product unless you are adverse to the filing.
Pros: price, 2 small risers look better than 1 long riser
Cons: Needed some filing to fit my picatinny rail
This review was written in the old system and had content requirements that are different than reviews written today.