hi, i just got a set to try low mount rings, sorry to say how poorly made these are. aside from holding a scope to a rifle, these are useless for any sort of precision. first off the pressed-in bolts of the base are too large for weaver or picatinny rail slots, the factory poorly tries machining some of the shaft diameter so they will drop into the base slot. in my case, they machined it at an angle so only one side fits the slot, the other does not. adding to that the hole for the scope tube is no longer in alignment with base/gun. had i tightened down the caps it would have damaged the scope tube. but luckily they tapped 4 of the 12 cap screws at angles(not on purpose, again due to poor quality) so i could not attempt to tighten down the caps until i found which screws were actually tapped perpendicular to base. at that point i threw in the towel and decided to drop more$$$ to save the head ache of damaged scope and wasted ammo trying to sight in an offset scope. overall rating of 2 because they are cheap, i would use them on an airsoft or nerf gun.
Pros: cheap,
Cons: poor quality, no precision at all, nothing lines up, could damage scope
This review was written in the old system and had content requirements that are different than reviews written today.