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The Marble Arms Rifle Uni-Ramp Front Sight puts a bright orange aiming point right where you need it. The whole thing is one piece of solid steel with a 3/4" long, .050" outside diameter fiber optic rod running through it, so you get a glowing dot that pulls in light and holds up in the woods at first and last light. This particular model measures .405" in height and is contoured for a .625" barrel, which is the detail worth double checking against your setup before you order.
What makes this Marble Arms sight handy is the one-piece design. The ramp and the fiber optic are built into a single body, so there's no separate ramp to fit and no bead to seat into a dovetail. It mounts with a single 6-48 screw, which means quick installs and just as quick swaps if you ever want to change it out down the road. It works on rifles, shotguns, and muzzleloaders that use a screw-held front sight.
Height is fixed on the Uni-Ramp, and that's the part people trip over. The .405" measurement runs from the top of the barrel to the top of the sight, so it needs to pair correctly with your rear sight to shoot to point of aim. The smart move is to shoot your rifle with the rear sight already in place, confirm where you land on paper, and then match the front sight height and barrel contour to that. Get those two numbers right and this becomes a clean, no-fuss upgrade.
Marble Arms has been making iron sights in the USA for a long time, and this one carries that reputation. The steel body wears a polished blue finish that blends in with a blued barrel, and the fiber optic rod is protected inside the housing rather than hanging out exposed. It's a simple, rugged piece that does exactly what a good hunting sight should do.
This model (MPN 072400) is contoured for a .625" barrel diameter with a .405" sight height. The height is measured from the top of the barrel to the top of the sight. Marble Arms offers other contours and heights, so match those two numbers to your rifle before ordering.
No, the height is fixed on the Uni-Ramp. That's why it's important to know the exact height your rifle and rear sight need ahead of time. The best way to confirm is to shoot your rifle on paper with your rear sight installed, then pick the front sight height that lines up your point of aim.
It installs with a single 6-48 screw, and the one-piece body means there's no separate ramp or bead to fit. That makes it a quick install and just as quick to swap out later. It fits rifles, shotguns, and muzzleloaders set up for a screw-held front sight.
The 3/4" long fiber optic rod does a good job gathering light and glows as a bright orange dot that stands out in dim conditions. It's tucked inside the steel housing rather than exposed, which helps protect it in the field. For dawn and dusk hunting, that glowing aiming point is the main reason folks reach for this sight.
| UPC | 871373007015 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 072400 |
| Color | ORANGE |
| Style | Fiber Optic |
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