EGW offers heavy-duty scope bases compatible with CZ models 452, 453, 455, 457, 511 and 512, featuring an 11mm dovetail design. These bases enable the integration of a one-piece picatinny scope rail onto your shotgun without the need for drilling or tapping. They are precision-machined from extruded aluminum, providing picatinny slot-and-rail spacing that facilitates quick and straightforward adjustments to eye relief, as well as extensive flexibility in scope selection. The bases are pre-drilled to align with the factory scope mount holes on the firearm's receiver and are compatible with both picatinny and weaver scope rings. The heavy-duty mounts are designed to be 0.10 inches lower than the lightweight versions, reducing weight and positioning the optic closer to the barrel centerline for enhanced accuracy. The full-width cross-slots adhere to MIL-STD1913 specifications with a tolerance of +/- 0.002 inches. Constructed from ultra-rigid extruded 7075-T6 aluminum, the package includes socket head Torx screws and a wrench. EGW advises applying 20 in-lb of torque and a drop of blue Loctite for optimal installation. EGW's scope bases enhance CZ models with picatinny rail versatility, enabling rapid eye relief adjustments and a broad selection of scopes, without drilling or tapping Expertly crafted from 7075-T6 aluminum, these robust bases feature a low-profile design, enhancing accuracy by positioning the optic near the barrel's centerline The bases are designed with full-width cross slots adhering to MIL-STD 1913 specifications, compatible with factory mount holes, and include Torx screws and a wrench for installation