Improves Target Visualization
Light gathering, polymer rod works in low light as well as bright to provide an easy-to-see, fast-pointing dot. Four colored rods let you change sights to fit shooting conditions. Locating fingers on each end center the sight on your rib; two strong magnets prevent movement.
Big Book Catalog, Issue:70, Page:291
SPECS: Base - Plastic, black. Rods - Polymer, red, green, yellow, orange. .170" (4.3mm) diameter sighting dot. M-300 - fits ribs 7⁄32" (5.5mm) to 5⁄16" (8.2mm) wide. M-400 - Fits ribs 5⁄16" (8.2mm) to 7⁄16" (11.3mm) wide. M-500 - Fits ribs 7⁄16" to 9⁄16" (11.3mm-14.5mm) wide. MPB - Fits all 16, 20 and 12 gauge, non-ribbed barrels.