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Marble Arms has been the go-to name for iron sights since 1900, and this 29-MR ramp-mounted front sight keeps that reputation intact. It carries a gold-colored 1/16" bead sitting at a .290" height with the familiar Marble contour, sized to slide into any front sight ramp cut for a 3/8" dovetail. The gold bead is the star here, catching light and pulling your eye to it quickly, which pairs beautifully with a rear peep or open sight when you want a clean, no-fuss sight picture.
This is the sight folks reach for when a rear peep or replacement rear sight leaves the rifle shooting a touch high and there's no adjustment left to give. Bumping up front sight height brings your point of impact back down where it belongs. The 29-MR falls on the shorter end of Marble's MR ramp lineup at .290", so it's a solid pick for dialing in that relationship between front and rear. It's a popular fix on lever guns like Winchester and Marlin, converted Mausers, and plenty of vintage rifles that need fresh glass up front.
Marble machines these a hair oversized on purpose, so expect a little fitting. A few passes with a fine slim-taper file on the male dovetail gets you a nice tight, rattle-free fit that holds zero. Never file the ramp's dovetail itself, just the sight. If you're not comfortable with the file work, a gunsmith can seat it in a few minutes.
The solid steel body means it takes recoil and rough handling without complaint, and the classic bead profile has proven itself in the field on hunting rifles for generations. If you're building a sight setup and need to nail the exact height, measure your rear sight and work out the math before ordering, since the MR series comes in several heights to match nearly any rifle.
It's designed to slide into any front sight ramp cut for a standard 3/8" dovetail, which covers most factory and aftermarket ramps. Marble machines the base slightly oversized, so you'll usually need a few light passes with a slim-taper file on the sight's dovetail for a snug fit. Only file the sight itself, never the ramp's dovetail slot.
Front sight height controls where your rounds land, taller drops impact lower and shorter raises it. The best approach is to sight in your rear sight first, see where you're printing on paper, then calculate the front sight height you need from there. The 29-MR sits on the shorter end of Marble's MR series, so it's often the answer when a new rear peep leaves you shooting high.
This is the gold-bead version, which reflects light and draws your eye quickly for a fast sight picture in most conditions. Ivory tends to stand out better against dark backgrounds and in shade. Both use the same 29-MR ramp profile, so it comes down to which one your eyes pick up best.
This is the ramp-mounted 29-MR, meaning it seats into a separate front sight ramp rather than directly into a dovetail cut in the barrel. The MR designation marks it as the narrower ramp-style profile. If your rifle has a barrel dovetail instead of a ramp, you'll want Marble's barrel-mounted W-series sight.
| UPC | 871373002034 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 502921 |
| Color | Gold |
| Style | Ramp Mounted |
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