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If you've got an older lever gun or a scopeless rifle that needs a fresh front bead, the Marble Arms 31-W is one of those parts that just belongs on the gun. It carries a 3/32" gold bead sitting .312" high on a .531" wide base, made to slide into a common 3/8" barrel dovetail. That gold bead catches light and pulls your eye to it in a hurry, which is exactly what you want when the target isn't holding still.
Marble Arms has been shaping front sights with this same contour since the early 1900s, and the reason folks keep coming back is simple: they're all steel, cleanly machined, and they look right on a classic rifle. The gold bead reads well against dark timber and shaded backgrounds, and it pairs beautifully with a peep or a semi-buckhorn rear if you're building out an iron sight setup.
This height and width combo is a popular fit for Winchester, Marlin, Savage and other lever and bolt guns wearing a standard 3/8" dovetail. The .312" height is a common replacement dimension, but sight height is always tied to your specific barrel and rear sight, so it pays to measure your old sight before ordering. Getting the front and rear heights matched up is what keeps your point of impact where it should be.
Dovetail sights are rarely a pure drop-in, and this one is no different. Most installs go smoothly with a brass punch and a little patience, though it's normal to do a touch of light filing on the base for a snug, drift-adjustable fit. Take your time, go slow on the metal, and you'll end up with a tight sight you can tap left or right to zero your windage. Done right, it looks like it left the factory that way.
It's built for any rifle cut with a standard 3/8" barrel dovetail, which covers a lot of classic Winchester, Marlin, Savage and similar lever and bolt guns. Since it's a dovetail sight rather than a ramp or screw-on, it slides directly into the barrel slot. Always confirm your barrel has the 3/8" dovetail and check your existing sight height before ordering.
Marble measures the height from the bottom of the dovetail to the top of the bead, so this sight comes in at .312". Your correct height depends on your specific barrel diameter and the rear sight you're running. The best move is to measure your old front sight and match it, or work out the math against your rear sight adjustment range.
Dovetail front sights usually take a little fitting rather than dropping straight in. Most people tap it in with a brass punch and do a bit of light filing on the base for a snug fit. Once it's seated properly you can drift it left or right to dial in your windage.
A gold bead shows up well against dark, shaded, or wooded backgrounds and gives your rifle a traditional, warm look that suits classic guns. Ivory tends to pop more in low light or against dark game, while fiber optic glows brightest in daylight. Gold is the go-to for that timeless field-and-timber setup.
| UPC | 871373002430 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 203131 |
| Color | Gold |
| Style | Barrel Mounted |
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