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Brownells

1911 Auto Ejection Port Grinding Stones - Ejection Port Grinding Stone Kit

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Kit Includes

Two B51 stones, two B42

Shaping Ejection

Port roll-over notch on 1911

Cobalt Impregnated

Aluminum oxide stones with 120

Smooth Cutting

Stones are intended for hardened

Stones Can

Be reground and reshaped for

$19.99
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SKU: 080810000

Overview

This stone kit is intended for shaping the ejection port roll-over notch on 1911 Auto slides, making it a focused choice for gunsmithing work on hardened steel. It includes B51 and B42 stones, with the B51 used for either short or long style notches and the B42 used to bring the long style notch to full depth. The cobalt-impregnated aluminum oxide stones are described as cutting quickly while leaving a smooth surface that can be polished or bead-blasted afterward. Regrindable stones and nickel-plated hardened steel shanks add durability for repeated shop use, and the kit comes with instructions.

Why Hunters Choose the Brownells

Cobalt-impregnated Aluminum

Oxide stones are made for

Includes B51

B42 stones for short or

Produces Smooth,

Ready-to-finish surface for polishing or

Stones Can

Be reground and reshaped for

Kit Includes

Instructions for straightforward setup and

Key Features

  • Kit includes two B51 stones, two B42 stones, and instructions.
  • Designed for shaping the ejection port roll-over notch on 1911 Auto slides.
  • Cobalt impregnated aluminum oxide stones with 120 grit.
  • Smooth cutting stones are intended for hardened slides.
  • Stones can be reground and reshaped for repeated use.
  • Hardened steel shanks are nickel-plated for long life.

Best Used For

  • 1911 pistol owners shaping the ejection port roll-over notch on hardened slides
  • Gunsmiths needing a stone kit for controlled ejection port work on 1911 Autos
  • Users wanting a smooth-cutting abrasive setup for short or long style notch work
  • Shop users who value stones that can be reground and reshaped for repeated jobs

Specifications

Grit120 grit
Includes(2) B51 stones, (2) B42 stones, and instructions
Quantity Of B42 Stones2
Quantity Of B51 Stones2
Shank Diameter1/8 in (3 mm)
Shank FinishNickel-plated
Shank MaterialHardened steel
Stone MaterialCobalt impregnated aluminum oxide

Pros

  • Cobalt-impregnated aluminum oxide stones are made for shaping hardened 1911 slides.
  • Includes B51 and B42 stones for short or long style ejection port notches.
  • Produces a smooth, ready-to-finish surface for polishing or bead-blasting.
  • Stones can be reground and reshaped for repeated use.
  • Kit includes instructions for straightforward setup and use.

Considerations & Trade-offs

  • Designed specifically for shaping the ejection port roll-over notch on 1911 Auto slides, so it is a specialized kit rather than a general-purpose stone set.
  • The kit is supplied with 120-grit stones, which supports material removal and shaping but still leaves a ready-to-finish surface that may need polishing or bead-blasting afterward.
  • The included B51 and B42 stones are intended for different steps in the notch work, so the kit may require some familiarity with the process to use effectively.
  • The stones can be reground and reshaped, but the hardened steel shanks are 1/8 inch (3 mm) diameter, so compatibility depends on the tool setup being used.

Suggested Comparisons

  • 1911 pistol gunsmithing tools
  • Ejection port modification tools
  • Abrasive stone kits
  • Firearm finishing and polishing supplies

Suggested Accessories

  • Honing stone
  • Polishing stone
  • Bench vise
  • Protective eyewear

Frequently Asked Questions

What is included in the kit?

The kit includes (2) B51 stones, (2) B42 stones, and instructions.

What is this kit used for?

It is designed for shaping the ejection port roll-over notch on 1911 Auto slides.

What type of stones are these?

They are cobalt impregnated aluminum oxide stones with a 120 grit specification.

Can these stones be reshaped after use?

Yes. The product description states the stones can be reground and reshaped for repeated use.

What size shank do the stones use?

The shank is listed as 1/8 inch (3mm) diameter.