I bought these rings to mount a scope on my AR-15. They appear to be very well made with a well machined and finished surface. They have a sticky sort of tape in the rings that protect the scope and prevent slippage well. They appear to be well alligned and do not show evident twisting or flexing of the scope when mounted. I didn't have to make huge adjustments when zeroing, so I think they align well with one another. I don't have 30mm scope mounting tools so this is all simply by eye. The mounting bolt screws directly into the opposite side of the aluminum base. I have not had any problems with this yet. I do suspect that the system would be stronger if the bolt screwed into a steel insert that fit into the aluminum on the opposite side of the mount. Overall I think it is a great product for the money. I wouldn't hesitate to buy another set if needed.
Pros: Well made, great finish, good alignment.
Cons: Could use slightly stronger base screw attachment....
Would recommend: Yes
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