Williams Gunsight Co. FireSight Set Mossberg 500/835 Fiber Optic Sight Set

The Williams FireSight Set from Williams Gunsight Co. is a high-visibility fiber optic sight set purpose-built for Mossberg 500 and Mossberg 835 shotguns. Designed as a direct upgrade for self-defense and tactical shotgun applications, this set installs directly onto Mossberg 500 models equipped with the factory rear sight base and also fits Mossberg 835 slug barrels equipped with a Williams rear sight base, with no gunsmithing required.

The set pairs a red fiber optic front ramped sight with a green fiber optic rear sight featuring a narrow aperture for fast target acquisition and a confident sight picture. The light-gathering fiber rods stay bright in low-light conditions, making this an ideal choice for home-defense and tactical shotgun setups where speed and clarity matter most.

Both sights are fully adjustable for windage and elevation, and the rear aperture serves as an "Ace in the Hole" backup if the primary aiming system is ever compromised. The set is CNC machined from aluminum and steel with a durable matte black finish that blends cleanly with most shotgun receivers. Whether you are running a pump-action or tactical shotgun, this FireSight set delivers a substantial upgrade over factory iron sights.