Should not order if you have a zoom scope (variable magnification), because you can't turn the scope zoom to adjust the magnification because the adapter is in the way, and also you can't read the magnification (zoom) that the scope is set-to because the adapter covers the magnification scale. Recommend you use the single adapter is you have a zoom scope.
Pros: Easy to install
Cons: Doesn't work on 'Zoom' scopes
This review was written in the old system and had content requirements that are different than reviews written today.