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A front sight is the one part of your setup your eye lands on first, and this Marble Arms 41-MR trades a dull bead for a glowing orange fiber optic rod that pulls in ambient light and lights up the moment the sun hits it. It sits .410" tall with a .340" wide ramp-style base, which puts it in the sweet spot for a lot of lever guns, slug shotguns, and muzzleloaders that run a front sight ramp.
Marble Arms has been building iron sights since the 1890s, and this one shows it. The sight body is CNC machined from solid steel rather than molded plastic, then given that gracefully contoured blade that slopes toward the muzzle for a clean, traditional profile. The .060" fiber optic rod is flared and locked permanently into the body, and both ends of the cable are polished so they soak up every bit of light available. Marble Arms also protects the optic from UV damage, so it keeps glowing bright after plenty of time out in the sun.
This is the ramp-mounted version, designed to seat into any standard front sight ramp cut for a 3/8" dovetail. The .340" base width is what separates it from the wider barrel-mounted blades, so make sure your gun runs a ramp. A quick note from folks who've installed these: the dovetail fit tends to run snug, so a sight pusher or a brass punch and light file work is often part of the job to get it seated clean and centered. That snug fit is a good thing once it's in, since it stays put.
Orange is one of the easier colors for most eyes to pick up against dark timber, brush, and shadowed targets, and it stands out well in low light at dawn or dusk. If your old bead sight has faded on you or you're just tired of hunting for the front post, this is a straightforward upgrade that makes your sight picture snap into focus.
This is the ramp-mounted version with a .340" wide base, built to seat into a standard 3/8" dovetail front sight ramp. It's listed as universal for rifles, slug shotguns, and muzzleloaders that run a front ramp. Check that your gun uses a ramp with a 3/8" dovetail rather than a barrel-mounted blade, since those use a wider base.
The .410" is the sight height, measured from the top of the bead down to the bottom of the dovetail, not the bore size. Height matters because it determines where your point of impact lands relative to your rear sight. Marble Arms offers the 41-MR in several heights, so pick the one that matches your sighting setup.
The orange rod gathers ambient light and glows noticeably, and orange tends to stand out well against brush, timber, and low-light conditions. Marble Arms flares and permanently sets the optic into the steel body and polishes both ends to maximize light transmission. The fiber is also protected against UV damage, so it holds its brightness over long-term sun exposure.
It seats into a 3/8" dovetail, but the fit usually runs snug, which is exactly what keeps it locked in place. Many installers use a sight pusher or a brass punch and do a little light file work on the base to get it centered and seated clean. Take your time, check the fit often, and it'll hold rock solid once it's in.
| UPC | 871373002652 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 604125 |
| Color | ORANGE |
| Style | Fiber Optic |
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