When designing the Area 419 CZ 455 Picatinny Scope Rail, company engineers wanted to eliminate the known issue of CZ 455 scope bases that shift position over time. To solve this problem, the company produces a single-piece design with several unique elements. Unlike the standard dovetail/setscrew design, the Area 419 CZ 455 Picatinny Scope Rail slides into the standard dovetail to be clamped down with a consistent force along the entire length of the ail mount. This enhances the strength with which the rail is mounted into place, ensuring that it won't come loose with correct installation. Machined from 7075 aluminum Matte-black finish Fits all Picatinny-style Mfg: Area 419