The weaver style clamp is made of non-hardened metal that bends when finger tightening the clamp nut. The worst is that after ten hours and several boxes of cartridges it could not be sighted in. There are two screws that must be tightened after getting the sight zeroed. Get this, one of them is on the bottom so the sight must be removed from the firearm for access so there goes your zero. There is access to the second screw but tightening it moves the zero about 14 inches right of zero at 25 yards. Worked and worked with this trying to account for offsets etc. before finally giving up and realizing the only thing I zeroed was my wallet.
Cons: Cheap and Unusable
This review was written in the old system and had content requirements that are different than reviews written today.