I was able to get a set of Warne Maxima #2B1LM rings - "High" - made for the CZ 527 - if you unscrew the recoil stud, they clamp perfectly onto the 16 mm dovetail on my BRNO No. 1 - made in 1955. I first installed #1B1LM (Medium) and the front objective was nicely clearanced to the barrel, but the bolt handle would hit the eyepiece on a Leupold VX Freedom 2-7x33 rimfire scope, so I had to use the "High" ones. These rings have the lever on the side for "Quick Detach" - I wanted to be able to remove the scope and re-install it without tools, to use the iron sights on the rifle. I would suggest to put your cap in "lock" before going to look at prices for these - pretty healthy!!!