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The Marble Arms 37W is a barrel-mounted front sight built to drop into a standard 3/8" dovetail. It carries a 3/32" gold bead that pops against dark game and shaded woods, and it stands .375" tall with a .531" base width. Part number 203731 for anyone matching it up against an existing sight or a Marble Arms height chart. This is the same style of contour sight the company has been turning out for well over a century, and it looks right at home on lever guns, single shots, and older sporters.
The gold bead is the star here. It grabs whatever light is around and gives your eye a bright, clean aiming point without washing out the way a plain black post can. Paired with a peep or a semi-buckhorn rear, that bead settles into the notch quick and helps you get on target fast. Marble Arms makes these from solid steel, so it holds up to knocks in the field and years of hard use.
Height is measured from the top of the bead to the bottom of the dovetail, so the .375" spec is your reference point when you're figuring out sight-in and matching it to your rear. Marble offers this contour in a whole range of heights from around .260" up past .570", which lets you dial in your point of impact instead of guessing. Keep in mind dovetail sights often need a little fitting. Some run slightly oversized from the factory, so a triangle file and a few careful passes may be needed to get a snug, drift-adjustable fit. Take your time, go slow, and check the fit often.
Marble Arms has been the go-to name in iron sights since the early 1900s, and their gear still shows up as factory equipment on plenty of American rifles. If you're restoring an old Winchester, Marlin, or Savage, or just want to swap a beat-up bead for something that works and looks the part, the 37W is a straightforward, durable choice.
It's built for a standard 3/8" dovetail, which covers a huge number of lever guns, single shots, and older sporters from makers like Winchester, Marlin, Savage, and Remington. Since dovetail sizes and heights vary, measure your existing sight cut and compare the .375" height to what you need. A little fitting is normal to get a clean, tight seat.
The height is taken from the top of the bead down to the bottom of the dovetail base. That measurement is what you use to match the front sight to your rear sight and get your point of impact where you want it. Marble offers this contour in several heights if the .375" doesn't line up with your setup.
The gold bead gathers ambient light and gives you a bright, warm aiming point that stands out well against dark targets and shaded timber. It's the traditional look a lot of folks want on a classic rifle. Ivory beads show up better in low light against dark backgrounds, and fiber optic glows brightest, so it comes down to your eyes and conditions.
Most of the time you can drift it into the dovetail with a brass punch and a light hammer, but dovetail sights frequently need minor fitting. Some run a touch oversized, so a triangle file to dress the base for a snug fit is common. Go slow and check the fit repeatedly so you end up with a tight, drift-adjustable sight.
| UPC | 871373002591 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 203731 |
| Color | Gold |
| Style | Barrel Mounted |
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