Williams Gun Sight .406'' Fiber Optic 406M Front Sight Steel Red

The Williams Gun Sight .406'' Fiber Optic 406M front sight brings fast target acquisition and bright visibility to your centerfire rifle or muzzleloader. This steel red fiber optic front sight uses ambient light to create a glowing aiming point that stays visible even in bright sunlight—no batteries, no electronics, just reliable optics that work when you need them. If you're upgrading from factory iron sights or building a truck gun that doesn't depend on batteries, this is a straightforward, proven solution.

The .406'' height medium profile fits most factory rifle ramps, including popular Marlin and Remington platforms. Installation is straightforward for anyone comfortable with basic gunsmithing. The red fiber optic element gathers available light and converts it into a bright, easy-to-see aiming reference that intensifies in good light without washing out—a real advantage over traditional brass or gold beads when you're moving between shadows and open terrain.

Williams Gun Sight has been building rifle sights since 1932, and the 406M carries that legacy: functional, no-frills engineering that works. This is the kind of sight you install, zero once, and forget about—until you realize how much faster you're picking up your target in the field.

Key Features

• Fiber optic red element glows brighter in stronger light; won't wash out in full sunlight
• .406'' medium height fits most factory rifle ramps including Marlin and Remington
• All-steel construction for durability and longevity
• Requires no battery or electronic power; works with ambient light only
• Quick to install on compatible rifles and muzzleloaders

Specifications

Frequently Asked Questions

Will this front sight fit my Marlin or Remington rifle?

The .406'' medium profile is designed to fit most factory rifle ramps on Marlin and Remington centerfire rifles. If your rifle has a standard factory ramp, this sight should work. We recommend measuring your existing sight or consulting your rifle's manual to confirm compatibility before purchasing.

Does the fiber optic element need a battery?

No. The red fiber optic element gathers ambient light naturally and glows brighter the more light is available. There are no batteries, electronics, or external power sources to maintain.

Can I use this sight on a muzzleloading rifle?

Yes. The Williams 406M is designed for both centerfire and muzzleloading rifles with compatible factory ramps.

Will the red fiber optic wash out in bright sunlight?

No. The fiber optic element is engineered to remain visible and bright even in strong sunlight, unlike traditional brass or gold sight beads that can become difficult to see in full light.