Hi Garrisone...I own 4 CZ, 3 – 452 Silhouette (.22 LR & .17 HMR), 453 American in .17HMR & an Anschutz 64 BR with Burris Signature Rimfire rings. Make sure you buy the Signature Rimfire Rings: (Black Matte High Rings# 420556 & Medium High 420554) with the synthetic posi-align inserts. They protect your scope from being marked up and with different offset rings will help you bring you back on target with out having to use your windage or elevation until the last few adjustments. They also ship in the same package as the 3/8” rings, 11mm claws to fit any 11mm dovetails...but they don't tell you that on any product info they have...but found out after talking to Burris. Hope this helps. They work great and hold very tight.