Used two of these to avoid milling rear sites from the barrel - mounted high 1" rings and scoped the rifle with a 2x7-28 pistol scope. Accurate out to 100 yds with touching holes - within 3/4 in grouping @ 200 yds.
Pros: Easy to mount -
Cons: modifications required
This review was written in the old system and had content requirements that are different than reviews written today.