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The Marble Arms #63 Flat Top Short Shank Rear Sight is one of those parts that quietly makes a rifle shoot the way you want it to. Marble Arms has been building rear sights since the late 1800s, and this short-shank flat top carries on that same formula: a sturdy black-coated steel body, a white diamond notch that jumps out against dark game or targets, and a step elevator that gives you real up-and-down adjustment without any tools. It drops into a standard 3/8" dovetail, so it's a natural fit on a wide range of lever guns, single shots, and classic sporters from makers like Winchester, Marlin, Remington, and Savage.
The flat-top profile keeps your field of view wide and open, which is exactly what you want on a hunting rifle or a plinker where quick target pickup matters more than target-grade precision. The hand-painted white diamond under the notch acts like a pointer, drawing your eye to center fast. For elevation, the stepped elevator slides forward and back to raise or lower the leaf, and windage is handled by drifting the base in the dovetail. On this short-shank #63, the total sight height adjusts from roughly .275" up to .505", which covers most standard barrel and front-sight combinations.
Because it uses the universal 3/8" dovetail, installation is usually a matter of drifting out the old sight and tapping this one in. If you're pairing it with a new front sight, it helps to measure your barrel diameters front and rear so you can match the proper sight heights and get your point of impact where you want it. Short shank means the body sits closer over the dovetail cut, which is the right call for shorter barrels or setups where a long-shank version would hang over too far.
If you're restoring a vintage rifle, upgrading a fixed-sight carbine, or just want that traditional open-sight look and feel back on a favorite gun, the #63 is a proven, no-nonsense choice that's been earning its keep for generations.
It's made for a standard 3/8" dovetail, which is the most common rear sight cut on lever guns, single shots, and classic sporters from brands like Winchester, Marlin, Remington, and Savage. If your rifle already has a dovetailed rear sight, this one will typically drift right in after you remove the old one. When in doubt, measure the width of your existing dovetail to confirm the match.
The main difference is the height range. The #63 short shank adjusts from about .275" to .505", while the taller #63H runs roughly .350" to .630". Choose the #63 for most standard barrel and front sight setups, and step up to the #63H if you need more elevation.
Elevation is handled by the step elevator, which slides forward and back under the leaf to raise or lower your point of impact. Windage is adjusted by gently drifting the sight base left or right within the dovetail. The white diamond notch helps you keep a consistent sight picture while you zero things in.
No, the #63 is a rear sight only. If you're setting up a complete iron sight package, you'll want to pair it with a matching front sight and, in some cases, a front ramp. Measuring your barrel diameters front and rear ahead of time makes it much easier to pick heights that put your zero where you want it.
| UPC | 871373004014 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 006300 |
| Color | Black |
| Style | Tang Sights |
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