Description
This is the Marble Arms 34-W barrel mounted front sight, standing .343" tall from the top of the bead down to the bottom of the dovetail. It carries the flat-faced 1/16" Pope's Island gold bead, which is the go-to choice for anyone who wants a warm, easy-to-pick-up aiming point that pops against dark game, brush, or a shaded backdrop. Marble has been turning out iron sights since around 1900, and this one carries the same gracefully contoured blade that slopes toward the front and gives a rifle that proper traditional look.
What Sets the 34-W Barrel Mounted Sight Apart
The "W" designation means this sight has the wider 17/32" base, which measures out to right around .531" at the bottom. That barrel mounted profile has rounded base sides, so it's meant for rifles where the front sight dovetail is cut directly into the barrel rather than sitting on a raised ramp. If your rifle uses a standard barrel dovetail, this is the family you want to be looking at. It's machined from steel with a clean finish, so it holds up to years of field carry and hard knocks without complaint.
Getting the Right Height on Your Rifle
Sight height matters more than folks expect. Front sights are measured from the bottom of the dovetail to the top of the bead, and this one comes in at .343". Before ordering, it's worth measuring your existing sight or checking a Marble height chart against your rear sight so the front and rear line up cleanly once installed. Most lever guns and older rifles take a bit of gentle filing or drifting to seat a new blade, and this one is no different, but that snug fit is exactly what keeps it locked in place downrange.
A Classic Fix for Lever Guns and Vintage Rifles
This sight is a favorite for restoring old Winchester and Marlin lever actions, Savage rifles, and just about any classic that came with a barrel dovetail up front. Swap out a broken, worn, or missing bead and you're back to a crisp sight picture that looks like it left the factory that way. The gold bead is especially handy in fading light, giving you that bright reference point when the deer decides to step out right at last shooting light.
Key Specifications
- Manufacturer: Marble Arms
- Manufacturer Part Number: 103431
- UPC: 871373002119
- Sight Height: .343" (top of bead to bottom of dovetail)
- Base Width: 17/32" (approx. .531")
- Style: Barrel Mounted, 34-W
- Bead Type: Pope's Island Gold, flat faced
- Bead Diameter: 1/16" (1.6mm)
- Bead Color: Gold
- Material: Steel
- Mounting: Barrel dovetail (rounded base sides)
- Category: Gun Sights
What’s Included
- One Marble Arms .343" 34-W barrel mounted front sight with 1/16" gold bead
Frequently Asked Questions
Will this 34-W front sight fit my rifle?
This is a barrel mounted sight with a wider 17/32" base and rounded sides, so it's made for rifles that have the front sight dovetail cut directly into the barrel rather than a raised ramp. It fits many classic lever guns and older rifles that use a standard barrel dovetail. Expect to do a little light filing or drifting to seat it snugly, which is normal for these blades.
How do I know if the .343" height is right for me?
Front sight height is measured from the bottom of the dovetail to the top of the bead, and this one measures .343". The easiest way to check is to measure your current front sight, or use a Marble Arms height chart alongside your rear sight so the two line up when you shoulder the rifle. If your rifle is shooting high or low with the rear sight maxed out, a different height may be needed.
What is a Pope's Island gold bead and why choose it over ivory?
The Pope's Island gold bead is Marble's flat-faced brass-colored bead in a 1/16" diameter. Gold shows up well against dark targets, brush, and shaded backgrounds, which makes it a strong pick for hunting and low-light conditions. The ivory white bead is the alternative if you tend to shoot against darker or wooded backdrops where a bright white dot stands out better.
Is this sight steel and how durable is it?
Yes, the blade is machined from steel with a clean finish, so it holds up to years of field use and the bumps that come with carrying a rifle in the woods. Marble has been building iron sights since around 1900, and their contoured blades have a long reputation for being strong and stable. Once fitted properly into the dovetail, it stays put.





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