Marble Arms .375'' Fiber Optic Glow 37-W Front Sight Steel Orange

The Marble Arms .375'' Fiber Optic Glow 37-W front sight brings a proven, no-fuss aiming solution to your rifle. Built from steel with a traditional blued finish, this front sight features a gracefully contoured blade that slopes naturally toward the front—a design that's been refining rifles for generations. The .060" diameter fiber optic rod glows in bright orange, giving you a crisp, visible sight picture in variable lighting without batteries or electronic components to fail in the field.

Designed for ramp-mounted installation, the 37-W sits on a .340'' wide base, making it compatible with most factory and aftermarket rifle ramp systems. Marble Arms sights are known for precision machining and clean finishing—this one is no exception. The orange glow rod provides excellent contrast against most hunting and tactical backgrounds, whether you're working in low light or bright sun. It's a straightforward, reliable choice for hunters, shooters, and anyone who values simplicity and durability over gadgetry.

If you're restoring a classic rifle, upgrading an older gun, or just want a dependable front sight that doesn't rely on electronics, the Marble Arms fiber optic glow sight delivers. The blued steel construction ages gracefully and resists corrosion when properly maintained, and the fiber optic rod is replaceable if ever needed. This is the kind of sight that works the same way at 32 degrees and at 95 degrees—no batteries, no software, no excuses.

Key Features

• Orange .060" fiber optic glow rod for enhanced visibility in variable light
• Steel construction with blued finish for durability and classic appearance
• Gracefully contoured blade design with forward slope
• Ramp-mounted base (.340'' wide) for standard rifle compatibility
• No batteries or electronics required

Specifications

Frequently Asked Questions

Will this front sight work on my rifle?

The 37-W is designed for ramp-mounted applications with a .340'' wide base. If your rifle has a factory or aftermarket ramp, this sight should be compatible. Check your rifle's ramp mounting system before purchasing to confirm fit.

Can I replace the fiber optic rod if it gets damaged?

Yes. The .060" diameter fiber optic rod is replaceable, so if it becomes cloudy or broken over time, you can source a replacement rod rather than replace the entire sight.

Does this sight need batteries?

No. The fiber optic glow rod is passive—it collects ambient light and glows without any batteries, electronics, or power source. It works in any light condition without maintenance or charging.

What color options are available?

This model is the orange version. Marble Arms also offers a green fiber optic rod option if you prefer that color.