Sporterizing the Mosin Nagant Part 5- Shortening the Barrel and Removing the Rear Sight Base

Published on December 5, 2010
Duration: 9:40

This guide details the process of sporterizing a Mosin Nagant by shortening the barrel and removing the rear sight base, as demonstrated by an expert gunsmith. Key steps include precise barrel measurement, cutting, and squaring the muzzle using specialized Brownells tools powered by a Milwaukee drill. The process emphasizes creating a professional 11-degree target crown for accuracy and safely removing the soldered rear sight base with an oxy-acetylene torch.

Quick Summary

Expert gunsmiths demonstrate sporterizing a Mosin Nagant by shortening the barrel to 22 inches and removing the rear sight base. The process involves using a hacksaw and belt sander for initial cuts, followed by Brownells tools and a drill for precise muzzle facing and an 11-degree target crown creation. The rear sight base is removed by heating it to 1100-1200°F with an oxy-acetylene torch to melt the solder.

Chapters

  1. 00:00Measure Barrel Length
  2. 00:55Cut Barrel with Hacksaw
  3. 01:54Square Muzzle with Belt Sander
  4. 03:00Face Muzzle with Brownells Tool
  5. 04:35Cut 11-Degree Target Crown
  6. 05:31Final Muzzle Polishing
  7. 06:36Disassemble Rear Sight
  8. 07:40Remove Sight Base with Torch

Frequently Asked Questions

How do you shorten a Mosin Nagant barrel without a lathe?

You can shorten a Mosin Nagant barrel using a hacksaw to make the initial cut slightly longer than your target length. Then, use a belt sander to square the muzzle, followed by specialized tools like the Brownells Muzzle Facing kit, powered by a drill, to achieve a precise and concentric finish.

What temperature is needed to remove a Mosin Nagant rear sight base?

The rear sight base on a Mosin Nagant is typically attached with silver solder. You'll need to heat it to approximately 1100-1200 degrees Fahrenheit using an oxy-acetylene torch to melt the solder and allow the base to be removed with a brass drift.

Why is cutting a target crown important on a sporterized rifle?

Cutting a target crown, such as an 11-degree crown, is crucial for accuracy. It ensures the rifling ends cleanly and uniformly at the muzzle, preventing gas from disturbing the bullet's flight as it exits the barrel.

What tools are essential for sporterizing a Mosin Nagant barrel?

Essential tools include a hacksaw, belt sander, safety glasses, a drill, and specialized gunsmithing tools like the Brownells Muzzle Facing & Chamfering Tool kit. An oxy-acetylene torch is needed for rear sight base removal.

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