Marble Arms .375'' Barrel Mounted 1/16'' 37-W Front Sight Steel White

The Marble Arms .375" Barrel Mounted Front Sight in Steel White is a traditional, time-tested aiming solution for rifles with dovetail cuts milled directly into the barrel. Built from quality steel with a blued finish, this barrel-mounted front sight delivers the simplicity and reliability that generations of hunters and shooters have relied on—no optics, no batteries, no complications. The gracefully contoured blade slopes gently toward the front, and the rounded base sides fit snugly into standard barrel dovetails for a secure, repeatable zero.

This particular model features a white polymer bead measuring 1/16" in diameter, offering good visibility in moderate to bright light while maintaining the classic iron-sight aesthetic. The 17/32" wide base (marked as "W" in Marble's lineup) is the industry standard for barrel-mounted applications, so fitment is consistent across most rifles engineered for this style of front sight. Whether you're building a vintage-inspired rifle, setting up a backup sight system, or restoring a rifle to its original configuration, this Marble Arms sight is purpose-built for durability and dependable performance in the field.

Marble Arms has been manufacturing rifle sights for over a century, and their reputation rests on straightforward design and meticulous machining. This front sight requires no special tools to install and aligns with your rear sight to establish your zero—a fundamental, uncluttered approach to rifle aiming that works in any weather and demands no maintenance beyond basic rifle care.

Key Features

• Steel construction with blued finish for durability and corrosion resistance
• White polymer bead (1/16" diameter) for clear, high-contrast aiming point
• Barrel-mounted design with rounded base sides for secure dovetail fit
• 17/32" wide base ("W" profile) for standard barrel dovetail compatibility
• Gracefully contoured blade design for refined aesthetics and functionality
• No batteries, electronics, or adjustments required—simple and reliable

Specifications

Frequently Asked Questions

Will this barrel-mounted front sight fit my rifle?

This sight is designed for rifles with a dovetail cut machined directly into the barrel. The 17/32" wide base ("W" profile) is the standard size for most barrel-mounted front sights. Before purchasing, confirm that your rifle has a barrel dovetail cut and measure the dovetail width to ensure compatibility. If you're uncertain, consult your rifle's documentation or the manufacturer.

What's included with this sight?

You receive the barrel-mounted front sight assembly with the white polymer bead and steel body. Installation into an existing dovetail cut is straightforward and typically does not require gunsmithing, though a proper dovetail pusher tool is helpful for safe, repeatable installation.

Can I use this sight as a backup to my primary optic?

Yes. The white bead provides an accessible aiming point if your primary optic fails or becomes obscured, making this sight a practical secondary aiming method. Many shooters and hunters use barrel-mounted iron sights as a failsafe alongside modern optics.

How visible is the white bead in low light?

The white polymer bead offers good contrast in daylight and moderate ambient light. In very low light or darkness, iron sights of any kind are challenging to use effectively. If you regularly shoot in low-light conditions, you may want to consider a primary aiming system designed for that environment.