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

The Marble Arms .375" Fiber Optic Glow 37-W Front Sight is a ramp-mounted front sight built for hunters and shooters who want a bright, reliable sight picture in low light. This steel sight features a glowing green fiber optic rod that catches ambient light and stands out in the field—no batteries required. The graceful, slope-contoured blade design is classic Marble Arms engineering, and the deep blued finish fits right in on any rifle worth carrying.

Built for rifles with ramp-mounted bases (0.340" wide), this front sight is a straightforward upgrade if you're stepping up from basic iron sights or running a backup system alongside a scope. The 0.060" diameter green optic rod is the business end—bright enough to acquire your target quickly in dawn and dusk conditions, when most hunting happens. Steel construction means it'll hold zero and take the recoil without complaint, year after year.

Marble Arms has been making sights since the 1890s, and this sight carries that reputation for no-nonsense reliability. Installation requires a ramp base compatible with your rifle's dovetail or mount point. If you're building a truck gun, a brush rifle, or just want irons you can trust, this is a solid choice.

Key Features

• Green fiber optic glow rod (.060" diameter) for low-light visibility—no battery needed
• Gracefully contoured steel blade with classic blued finish
• Ramp-mounted base (.340" wide) for secure installation
• Precision-made by Marble Arms, a trusted name in rifle sights
• Designed for rifles with compatible ramp mount systems

Specifications

Frequently Asked Questions

What rifles use a ramp-mounted front sight?

Ramp-mounted sights fit rifles with a ramp base already installed or compatible dovetail mounts. Common examples include classic lever guns, some shotguns, and older rifle designs. Check your rifle's mounting system to confirm a 0.340" wide ramp base will fit before ordering.

Does the green glow work in bright daylight?

Fiber optic sights work best in low-light conditions—early morning, late evening, and overcast days. In bright sunlight, the fiber rod is still visible but less dramatic than in dim light. That's why they excel as hunting sights.

Does this come with the ramp base?

This is the front sight blade itself. You'll need a compatible ramp-mounted base (0.340" wide) already installed on your rifle. If your rifle doesn't have a ramp base, you may need to source one separately or consult a gunsmith about installation.

Can I use this with a scope?

Yes. Many hunters run fiber optic iron sights as a backup to a scope or for quickly engaging close targets. The sight doesn't interfere with scope mounting as long as your setup allows clearance.