The TRUGLO 5/16" Pro-Series Magnum Gobble-Dot Fiber Optic Shotgun Sights are what you need for your shotgun. These sights have contrasting colors.
Most Benelli Super Black Eagle/M1/Nova
Ruger Red Label
Specifications and features:
Fits 5/16" ribs
Red front sight, green rear sight
Securely mounts to rib without tape or magnets
0.035" front & rear dia.
Increases visibility and accuracy in low-light shooting conditions
Endorsed by the National Wild Turkey Federation