If you have one of the CZ 527 series rifles, you know the 16mm dovetail is an O.E.M. specific, unique size, limiting choices. I have found these rings have the same CZ quality as their rifles, regarding fit, quality and finish. These allow my 50mm scope to just fit my heavy barrel, so anything less shouldn't be a clearance issue. The rear ring has a machined in "Lug" to keep them front on front, rear on rear, and dovetail mounting screw's on the left side of receiver (On a R/H Rifle). The O.P. price with free ship is nearly the same as buying from factory. You cannot go wrong with these rings! Bulletproof, easy can't fail install, and CZ quality! I might mention also, I "Lap" my rings, and there was almost no misalignment, and required almost no real metal removal. They only come in one height, which may be a "Con", but not for my set-up. I cannot see any disappointment, and would highly recommend these.
Pros: Exact Factory Fit & Finish
Would recommend: Yes
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