Reproduction 1911 rear sights, that were included on several early variants of the 1911. Bringing their expertise in refinishing original 1911 pistols, Turnbull Manufacturing is now creating replacement parts for these classic firearms. Reproduction rear sights are available as a flat top style. Features a proper round notch for sighting. In 1913, the flat top version was introduced, and was used between serial numbers 62,001 through 958,100. The flat top style was also used on all Remington-UMC & Singer pistols. Steel construction with a blued finish. Mfg: Doug Turnbull Restorations SPECS: Fits Colt 1911 pistols with a Colt/GI rear cut. Steel construction with a blued finish.