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The Marble Arms Rifle Dovetail Front Ramp is a machined steel base that gives you the height and the dovetail you need to run a proper front sight on your rifle. This one is set up for a .875" barrel diameter and adds .100" of sight height, measured from the bottom of the barrel radius to the bottom of the dovetail. If your front bead is sitting too low and your groups are climbing or dropping because the front and rear sights don't line up, a ramp like this is the part that gets everything back in sync.
The ramp mounts to the barrel and gives you a standard 3/8" dovetail up top, which is the same slot the whole Marble Arms front sight lineup drops into. That means you're not locked into one bead. You can run a plain steel bead, a gold or ivory colored bead, or a fiber optic blade depending on how you like to pick up the target in the field. The contour on the base is cut to match a .875" barrel so it seats clean and keeps the lines of the gun looking right instead of perched up on a mismatched foot.
Installation runs off a single 6-48 screw that threads into the barrel, and many gunsmiths also solder the base for a permanent, rock steady hold. The flat-base versions in this family are drilled for two mounting screws, but this contoured ramp uses the screw-and-solder setup. It's a job worth having a qualified gunsmith handle if you're not comfortable drilling and tapping a barrel, since front sight regulation depends on getting the ramp square and centered.
Marble Arms has been building iron sights in Gladstone, Michigan for well over a century, and their steel ramps have a reputation for holding zero and taking abuse. Pair this base with the matching front blade of your choice and you've got a clean, dependable open sight setup that'll outlast a lot of the plastic factory sights it replaces.
This ramp is contoured for a .875" barrel diameter, so the base seats flush against the curve of the barrel. If your barrel measures a different diameter at the front sight location, Marble Arms makes this same ramp in other contours like .625" and .6875". Always mic your barrel at the exact spot the ramp will sit before ordering.
The ramp has a standard 3/8" front sight dovetail, so any Marble Arms ramp-style front blade drops right in. You can choose a plain bead, a gold or ivory colored bead, or a fiber optic blade depending on how you want to pick up the target. Front blades are sold separately since folks like different heights and styles.
The .100" figure is the ramp height measured from the bottom of the barrel radius to the bottom of the dovetail. You add the height of whatever front blade you install on top of that to get your total sight picture. Matching the combined front height to your rear sight is what keeps your point of aim and point of impact lined up.
It mounts with a single 6-48 screw that threads into the barrel, and soldering the base is a common way to make it permanent and rock solid. Getting the ramp square and centered matters for front sight regulation, so a lot of folks have a qualified gunsmith drill, tap, and set it. If you've done sight work before and have the right tools, it's a manageable job.
| UPC | 871373007213 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 072312 |
| Color | Black |
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