Specifications and Features:
Installs onto the rib simply with strong magnets
Change from red to green color merely by turning the sight around
Includes round and triangular pipes
Ribs from .360" - .440" (23/64 - 7/16", 9mm - 11.1mm). Fits Winchester: all post 1964 pumps and autoloaders; Mossberg: All (except ported models); Browning: Citori target grades (except super wide ribs); Beretta: S682 Comp, trap guns.