The Zee rings run $5 to $10 more than the standard Weaver rings, but the advantage is that they have one screw on either side which makes it easy to line up your scope. With the Weaver rings that have two screws on one side and none on the other, the scope often rotates as you tighten the screws, making it difficult to get your cross hairs perfectly aligned. If you must use Weaver, the Grand Slam ring is a good option, because it also has one screw per side and is easy to align scopes with. I won't use the Millet Angle locks under any circumstances. Many people actually refer to them as Mangle Locks.