How to Cut a New 3/8 Inch Front Sight Dovetail in a Rifle Barrel | The Model 67 Project | MidwayUSA

Published on June 17, 2008
Duration: 1:29

This guide, presented by Larry Potterfield of MidwayUSA, details the process of cutting a new 3/8 inch front sight dovetail in a rifle barrel. It emphasizes the use of specialized tools like the Wheeler Engineering fixture and appropriate files, along with careful measurement and leveling, to achieve a precise fit. The procedure is essential when shortening a barrel and relocating the front sight, requiring knowledge and patience for successful execution.

Quick Summary

To cut a new front sight dovetail, level the barrel, clamp a specialized fixture, and use mill bastard and 60-degree files. Apply chalk to files to prevent loading and oil during installation to avoid galling. Patience and the right tools are key.

Chapters

  1. 00:05Introduction: Moving Front Sight
  2. 00:10Tools and Fixture Overview
  3. 00:20Marking and Removing Old Sight
  4. 00:30Leveling Barrel and Fixture Setup
  5. 00:41Cutting the Dovetail with Files
  6. 00:51Preventing File Loading
  7. 00:57Checking Fit and Lubrication
  8. 01:07Next Steps: Barrel Cutting and Recrowning
  9. 01:11Conclusion: Requirements for Success

Frequently Asked Questions

What tools are essential for cutting a new front sight dovetail?

Essential tools include a brass punch for removing the old sight, a steel block and bubble level for barrel alignment, a specialized cutting fixture (like Wheeler Engineering's), a mill bastard file, a 60-degree safe-sided file for corners, chalk to prevent file loading, and oil for lubrication.

How do you ensure the new dovetail is cut accurately?

Accuracy is achieved by first leveling the barrel, then securely clamping the cutting fixture to ensure it remains perfectly aligned. Filing should be done carefully, following the fixture's guide, and checking the fit frequently.

What is the purpose of using chalk on a file when cutting metal?

Applying chalk to a file helps to prevent metal filings from accumulating and clogging the file's teeth, a process known as 'loading.' This ensures the file cuts more efficiently and prolongs its lifespan.

Why is it important to use a brass punch when removing a front sight?

A brass punch is recommended over a steel punch because it is softer. This prevents damage to the front sight itself or the surrounding barrel material during the process of driving the sight out.

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