I've been called a "snob" - and worse - for my closely held opinions regarding scope rings, so I thought it time to cllear the air regarding that.
First of all, my opinions are based upon almost fifty years of shooting experience and 45 years as an Engineer.
Second of all, my opinons and advice are offered mainly in an effort to save some people from spending money on something that they are likely to be unhappy with, not for any benefit to me. If y'all choose to ignore my advice, feel free.
1. I believe that Millet "Mangle-Lock" rings are a disaster waiting to happen. By design, they have rear ring windage adjustment; they heavily advertise them as having such. Sounds great. But, think like an Engineer for a second. A scope is a long rigid tube held in place by two short rigid tubes (the rings). If all is in perfect alignment, great. Now, start twisting the scope rear to the side while holding the front in place.
The result, if you atre lucky, is that the internal scope mechanism (think of the tiny clearances inherent in such a mechanism. One click moves the crosshair so the POA changes 1/8" at a hundred yards. Amazing.) binds up a little. Not damaging, but darn annoying when you are trying to hit that little dot at 100 yards. If you have my kind of luck, you just cut a ring mark into the scope ($$) or bent it. I highly recommend Millet rings for BSA scopes, BTW.
Millet enthusiasts will say "BS. Just slightly loosten the front ring while you adjust the rear one." Might work, but who does this? Sorry, doesn't wash.
2. I believe that BKL products are strong as a bridge - and look it. Their function is fine; IMHO they ruin the appearance of a fine rifle since they are so "industrial" in looks. I used to think they were inexpensive, but no more, since - horrors - I just ordered my first set of BKL products in a long time to actually use on one of my rifles. (gmd1950 just collapsed. Get him some oxygen.) I bought a set of BKL risers (of course, in order to mount a set of Burris Signature Zee rings ) for my Wifama WZ78 rifle; on that piece they will "go" perfectly, since the whole rifle is "industrial" in look.
Cheap? Not so much. Ordered directly from BKL they cost me more than the Signature Zees did.
3. I believe that the Burris Signature system is the work of at least one highly intelligent individual. They are all steel, made in the USA, will NOT mark your scope, are self aligning so they do NOT need lapping, and, if you buy the offset insert kit, allow solutions to a lot of scope/rail problems as well as serving as a poor man's sloping rail system. A little spendy, but other than that, what's not to like? If you own a CZ, the wonderful J&P adapters are the way to go. Complicated? I think not.