Both ring screws' that screw the rings' to the base , weren't threaded all the way . So I couldn't tighten them down to the bases'. Had to end up taking them to the local gunsmith so he could finish the thread's. 6-40 threads. Impossible to find a tap locally. Would have sent them back , But didn't have time to wait for replacement pair. Ended up costing me $15 to get them fixed.
Pros: Just another pair of rings'
Cons: Bad quality control
This review was written in the old system and had content requirements that are different than reviews written today.