Description
Marble Arms has been turning out quality iron sights out of Gladstone, Michigan since 1892, and the 57W front sight carries on that reputation. This is the .570" tall model, measured from the top of the bead down to the bottom of the dovetail, which makes it one of the taller options in the barrel-mounted lineup. That extra height comes in handy when you need to bring your point of impact down or you're pairing it with a taller rear or tang peep sight. The 1/16" gold bead catches light well and gives you a fine, precise aiming point that works great in decent shooting conditions.
What Sets the Marble 57W Front Sight Apart
Everything Marble makes is all steel and all American, and this sight is no exception. The body is machined steel with that signature contoured blade that slopes toward the muzzle, which is both a nice classic look and a functional shape that cuts glare. The gold bead, sometimes called a Pope's Island bead, is a proven choice for hunters and target shooters who want something brighter than plain steel but still fine enough for careful work.
Fitting the .570" Barrel Mounted Front Sight
The base is cut for a standard 3/8" (.531") dovetail, the most common size found on lever guns, single shots, and plenty of older rifles. As with most quality dovetail sights, plan on a little hand fitting during install. Marble tends to run their bases slightly oversized on purpose so you can file them down for a nice tight, drift-to-zero fit rather than having them rattle loose. A brass punch and a small file will get you there, and once it's seated it stays put.
Whether you're restoring a classic lever action, replacing a worn or damaged bead, or just want a cleaner sight picture on your hunting rig, the 57W is a dependable, good-looking upgrade that should serve you for decades.
Key Specifications
- Manufacturer: Marble Arms
- Model: 57W
- Manufacturer Part Number: 105731
- UPC: 871373002331
- Sight Height: .570" (top of bead to bottom of dovetail)
- Base Width: .531" (3/8" dovetail)
- Bead Size: 1/16"
- Bead Color: Gold
- Mounting Style: Barrel Mounted, Dovetail
- Material: Steel
- Country of Origin: USA
What’s Included
- Marble Arms 57W front sight with 1/16" gold bead
Frequently Asked Questions
What size dovetail does the Marble Arms 57W front sight fit?
It's cut for a standard 3/8" barrel dovetail, which measures about .531" wide. That's the most common dovetail found on lever actions, single shots, and many older rifles. As with most quality dovetail sights, expect to do a little hand fitting for a snug fit.
How tall is this front sight and why does height matter?
This model stands .570" tall measured from the top of the bead to the bottom of the dovetail, making it one of the taller options in the 57W family. Front sight height directly affects where your rounds land, so a taller sight lowers your point of impact. Picking the right height helps you get zeroed without maxing out your rear sight adjustment.
Does the 57W front sight need any fitting to install?
Usually yes. Marble runs their bases slightly oversized on purpose so you can file them for a tight, drift-to-zero fit instead of a loose one. A brass punch and a small file make the job straightforward, and once it's seated it holds zero well.
What's the advantage of the gold bead over a plain sight?
The 1/16" gold bead catches ambient light and gives you a brighter, easier-to-see aiming point than bare steel. At the same time, the 1/16" size keeps it fine enough for precise shots on target or game. It's a classic setup that hunters and target shooters have trusted for generations.





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