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Hss Semi-Auto Pistol Sight Base Cutter - 60 Hss Semi-Auto Base Cutter .330''''
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
Designed for milling-machine use, this sight base cutter is intended for cutting dovetails on semi-auto pistols that use either a 60° or 65° shoulder.
$17.99
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SKU: 080621331
Overview
Designed for milling-machine use, this sight base cutter is intended for cutting dovetails on semi-auto pistols that use either a 60° or 65° shoulder. It is suited to standard Colt factory and mil-spec 1911 Autos, as well as replacement sights such as Wichita Hi-Mount and older Bo-Mar styles with a 65° shoulder. The .330" cutting diameter is meant to require more than one pass, allowing for factory variation and milling tolerances. High speed steel construction and the compact 2" length make it a specialized shop tool for sight installation work rather than general-purpose use.
AI Recommendation
Designed for milling-machine use, this sight base cutter is intended for cutting dovetails on semi-auto pistols that use either a 60° or 65° shoulder.
Why Hunters Choose the Brownells
Both 60°
65° shoulder sight dovetails
Suitable Standard
Colt factory and mil-spec 1911
Matches Replacement
65° shoulders, including Wichita Hi-Mount
Actual Cutting
Diameter is .330 inches for
Intended Milling
Machine use only
Key Features
- Designed to cut dovetails for both 65° shoulder and 60° shoulder rear sights.
- Sized for standard Colt factory and mil-spec 1911 Autos.
- Also fits replacement sights such as Wichita Hi-Mount and older Bo-Mar styles.
- Actual cutting diameter is .330", so more than one pass may be required.
- Made for use in a milling machine only.
- High speed steel construction, 2" long.
Best Used For
- For gunsmiths fitting rear sights on standard Colt factory or mil-spec 1911 Autos.
- For users installing replacement sights with 65-degree shoulders, including Wichita Hi-Mount and older Bo-Mar styles.
- For milling-machine work where a .330-inch cutting diameter and multiple passes are acceptable.
- For shops needing a cutter that also matches some 60-degree dovetail rear sights.
- For experienced pistol builders working on sight-base dovetails with factory variation in mind.
Specifications
| Caution | For use in milling machine only |
|---|---|
| Compatibility | Designed to cut dovetails for standard Colt factory and mil-spec 1911 Autos; replacement sights like Wichita Hi-Mount, older Bo-Mar and others with a 65° shoulder; also some rear sights with a 60° dovetail |
| Cutting Diameter | .330 in |
| Length | 2 in (5 cm) |
| Material | High speed steel |
| Notes | More than one pass required to install most sights |
| Shoulder Angle | 60° / 65° |
| Use | For use in milling machine only |
Pros
- Designed for both 60° and 65° shoulder sight dovetails
- Suitable for standard Colt factory and mil-spec 1911 Autos
- Matches replacement sights with 65° shoulders, including Wichita Hi-Mount and older Bo-Mar
- Actual cutting diameter is .330 inches for controlled fitting
- Intended for milling machine use only
- High-speed steel construction
Considerations & Trade-offs
- Designed for milling-machine use only, so it is not a general-purpose hand tool.
- The .330" cutting diameter is intentionally undersized for most sights, which means more than one pass is typically required.
- It is intended for 60° and 65° shoulder dovetails, so it is not the right cutter for low-mount adjustable sights or other sight profiles.
- Compatibility is specific to certain 1911-style and replacement rear sights, so fit should be verified against the sight being installed.
Suggested Comparisons
- 1911 sight installation tools
- Milling machine cutters
- Pistol gunsmithing tools
- Dovetail sight cutters
Suggested Accessories
- Milling machine accessories
- Sight installation tools
- Gun vise accessories
- Shop measuring tools
Frequently Asked Questions
What sight bases is this cutter intended for?
It is designed to cut dovetails for both standard Colt factory and mil-spec 1911 Autos, and for replacement sights such as Wichita Hi-Mount and older Bo-Mar styles with a 65-degree shoulder. The description also notes that some makers use a 60-degree dovetail on their rear sights.
Is this cutter for low-mount adjustable sights?
No. The description says low-mount adjustable sights should use the Standard Sight Base Cutter shown on the page instead.
What is the cutting diameter?
The actual cutting diameter is .330 inches.
Will one pass usually finish the sight cut?
No. The description says more than one pass will be required to install most sights, and that this is intentional to account for factory variations in base width and milling tolerances.
What equipment is this cutter meant to be used with?
It is for use in a milling machine only.