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Marble Arms has been the go-to name for gun sights since 1900, and this 50W front sight carries that same reputation forward. It uses a green fiber optic rod paired with the classic Marble contour, so instead of squinting at a dull bead you get a glowing green reference point that gathers ambient light and shows up fast when you're lining up a shot. It's machined from solid steel, which means it holds up to recoil and rough handling the way a good iron sight should.
The key numbers here are a .500" height (measured from the top of the bead down to the bottom of the dovetail) and a .531" width, which is the barrel-mounted profile built to seat into a standard 3/8" dovetail. The fiber optic runs through a 3/32" bead housing, giving you a nice sized dot that's easy to pick up quickly without washing out your target. Green is one of the easier colors for most eyes to catch in flat light, which is a big reason folks reach for it.
Like most quality dovetail sights, this one is meant to be fit rather than dropped in. Marble makes these slightly oversized on purpose so you can file the base for a tight, drift-adjustable fit in your dovetail. A few passes with a fine file usually does the trick, and once it's seated it stays put. If you're pairing it with a rear peep or open rear, the .500" height is a popular pick for raising your point of impact when your rear sight has run out of down travel.
This is a favorite among hunters and target guys running lever guns, older Winchesters and Marlins, and other 3/8" dovetail barrels who want a modern, high-visibility upgrade over a plain bead. If your eyes aren't what they used to be or you just want faster acquisition at dawn and dusk, that green rod earns its keep in the field.
It's built for a standard 3/8" dovetail with a .531" barrel-mounted width, so it fits many lever guns and older Winchester and Marlin barrels cut for that dovetail. Marble intentionally runs these a touch oversized, so plan on light filing for a snug, drift-adjustable fit. Measure your existing dovetail before ordering to be sure it's a match.
The height is .500", measured from the top of the bead down to the bottom of the dovetail. That measurement matters when you're pairing it with a rear peep or open rear sight, since front sight height directly affects your point of impact. If your rear sight is bottomed out and still shooting high, a taller front like this helps bring it back down.
Yes, a bit of gunsmithing is expected. You'll typically use a fine file to fit the base to your dovetail and a brass punch to drift it in for windage. Take your time and file gradually so you end up with a tight fit that won't wander under recoil.
Green tends to be one of the easiest colors for most eyes to pick up quickly, especially in flatter light conditions. The fiber rod gathers ambient light and glows, giving you a bright aiming point without batteries. If you hunt at dawn and dusk or just want faster target acquisition, green is a solid pick.
| UPC | 871373002867 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 205036 |
| Color | GREEN |
| Style | Fiber Optic |
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