The EGW Heavy Duty Scope Base is precision-engineered for CZ rifle models with 11mm dovetail rails and 0 MOA elevation for optimal scope mounting performance.EGW CZ 452/453/455/457/511/512 Heavy Duty Scope BaseCompatible with CZ models: 452 453 455 457 511 and 51211mm dovetail rail system for secure mounting0 MOA elevation for precision shootingHeavy duty construction for durability and reliabilityEssential for shooters seeking a robust precision scope mounting solution for their CZ rifles ensuring consistent accuracy and reliable optic attachment.