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If you're fitting a collar-style reverse plug on a 1911, this is the tool that gets the counterbore right. The EGW Carbide Reverse Plug Reamer is a self-piloted reamer designed to open up the recoil spring tunnel to the proper depth and diameter, so a reverse plug seats correctly and the recoil spring stays captured the way it should. It runs on a 7/16 inch shank and measures roughly 8 inches long, giving you plenty of reach into the slide.
EGW offers this reamer in both high speed steel and carbide, and the carbide blades are the ones you want when you're cutting into a hardened slide. Anyone who has tried to touch a Springfield or other commercial slide knows that HSS cutters can skate right off the surface. Carbide has the hardness to bite in and hold a clean edge cut after cut, which is exactly why it holds up on the tough stuff without dulling out mid-project.
The defining feature here is the live pilot. It rides in the existing bore and keeps the reamer aligned and stable while it cuts, so you're not fighting chatter or a counterbore that wanders off center. That alignment is the difference between a plug that drops in square and a repair that fights you the whole way. This is the reamer 1911 folks point to when the subject of collar reverse plugs comes up, since it takes the guesswork out of getting the tunnel dimensions correct.
Reverse plugs show up on comp guns, bull barrel builds, and pistols where there's no barrel bushing to retain the recoil spring, along with Officer's-size 1911s running full length guide rod kits. Whether you're a working gunsmith or a home machinist with a lathe or mill, this reamer gives you a repeatable way to prep that spring tunnel. Best results come from running it in a machine rather than by hand, and it pairs naturally with EGW's own reverse plugs and flat wire spring kits.
It's a self-piloted reamer that cuts the recoil spring tunnel on a 1911 slide to the correct depth and diameter for a collar-style reverse plug. That counterbore is what lets the plug seat properly and keeps the recoil spring captured. It's a specialized cutting tool for reverse plug work, not a general-purpose gunsmithing bit.
EGW makes this reamer in both HSS and carbide. The carbide blades hold up far better when cutting into hardened commercial slides, where HSS cutters tend to skate off or dull quickly. If you're working on tough slide steel or doing this more than once, carbide is the smarter buy for a clean, lasting edge.
You'll get the best and most accurate results running it in a milling machine or lathe. The live pilot keeps the cut aligned and stable, but a machine setup gives you the control needed for a square, centered counterbore. Freehand work is not the way to get a precise result out of this tool.
Reverse plugs are used on comp guns, bull barrel pistols, and any build where there's no barrel bushing to retain the recoil spring. They also show up on Officer's-size 1911s running full length guide rod setups. If your project uses an EGW-style collar reverse plug, this reamer preps the spring tunnel to accept it.
| UPC | 841370108800 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 70750 |
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