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Marble Arms has been building front sights since 1900, and the 50-MR is a piece of that heritage doing what it does best: giving you a crisp, high-visibility aiming point on a classic lever gun or bolt rifle. This is the .500" tall version with a .340" wide base, topped with a 1/16" gold bead that catches light beautifully in the woods or at the range. It's cut for ramp mounting, so it slides into any front sight ramp with a 3/8" dovetail.
The gold bead is the star here. That bright metallic dot stands out against dark targets and dim backgrounds far better than a plain black post, which is exactly why it pairs so well with a Williams, Skinner, or similar peep sight. You get fast target acquisition without the fragility of a fiber optic rod, since there's nothing to snap or fall out over the years.
The whole point of a taller front sight like this .500" model is dialing in your zero. If your rear peep is bottomed out and you're still shooting high, or you've run out of adjustment, stepping up to a taller front bead brings your point of impact back where it belongs. Marble offers this profile in several heights for that exact reason, and getting the right one comes down to shooting your rifle on paper first and measuring from there.
These are machined from solid steel with the signature Marble contour that slopes toward the muzzle for a clean sight picture. The dovetail runs a touch oversized on purpose so you can file it for a tight, rattle-free fit. A few passes with a slim taper file is usually all it takes, and once it's seated it isn't going anywhere. Folks fitting these to Marlin 336, Winchester 94, and similar lever actions report the height works out well alongside a receiver peep once they've confirmed their numbers.
This sight drops into any front sight ramp cut with a standard 3/8" dovetail, which covers a huge range of lever guns and bolt rifles. Owners commonly fit these to Marlin 336, Winchester 94, and similar classic actions. The base runs a bit oversized so you can file it for an exact, tight fit in your particular dovetail.
Front sight height controls your point of impact, so the correct pick depends on your rifle, load, and rear sight setup. The reliable way is to shoot your rifle on paper with your rear sight installed, then measure how far off you are and calculate the height you need. Marble offers this profile in several heights, so if the .500" isn't quite right you can step taller or shorter.
The gold bead gives you a bright, high-contrast aiming point that shows up well against dark targets and in low light, without any parts that can break. Fiber optic rods glow nicely but the rods can snap or work loose over time. A solid gold bead is the traditional, durable choice that holds up season after season.
Installation is straightforward but usually needs a little hand fitting. The dovetail is made slightly oversized on purpose, so a few light passes with a slim taper file gets it seated snug and rattle-free. If you're comfortable working on your own rifle it's a simple job, otherwise any gunsmith can drop it in quickly.
| UPC | 871373002256 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 505021 |
| Color | Gold |
| Style | Ramp Mounted |
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