How To Episode 13: Accurizing the ATI Mosin Nagant

Published on October 22, 2013
Duration: 24:18

This guide details how to accurize a Mosin Nagant rifle by modifying an ATI polymer stock for barrel free-floating and performing epoxy bedding. Expert instructor Eric demonstrates advanced gunsmithing techniques, including milling the stock channel and using Acraglas for a stable action fit, significantly improving potential accuracy. The process requires specialized tools and careful application of release agents and epoxy.

Quick Summary

Accurizing a Mosin Nagant involves modifying an ATI polymer stock for barrel free-floating and performing epoxy bedding. This process, demonstrated by expert Eric, uses specialized burrs to mill the barrel channel and Brownells Acraglas for a stable action fit, significantly enhancing rifle accuracy. Proper use of release agents is critical to prevent permanent bonding.

Chapters

  1. 00:00Introduction and Tools
  2. 01:54Free Floating the Barrel
  3. 03:06Milling the Stock Edges
  4. 05:51Opening the Forend and Channel
  5. 12:22Testing the Free Float
  6. 13:06Preparing for Bedding
  7. 15:59Applying Release Agent
  8. 17:49Mixing and Applying Acraglas
  9. 21:07Setting the Action and Cleanup

Frequently Asked Questions

How do you free float a Mosin Nagant barrel in an ATI polymer stock?

To free float the barrel, carefully mill the polymer stock's barrel channel using a drill and specialized burrs. Ensure the barrel has clearance along its entire length, especially at the forend, by removing material from the stock's channel edges and interior.

What is the purpose of epoxy bedding for a Mosin Nagant?

Epoxy bedding, using compounds like Brownells Acraglas, creates a precise, stress-free fit between the rifle's action and the stock. This stability prevents shifting during firing, which is crucial for maximizing accuracy potential, especially with aftermarket stocks.

What tools are needed for bedding a Mosin Nagant action?

Essential tools include a drill with cylindrical and round rotary burrs for stock modification, Brownells Acraglas epoxy (resin, hardener, release agent), a scribe for bubble removal, and basic tools like screwdrivers. A torque wrench is recommended for final assembly.

Why is a release agent critical when bedding a firearm action?

A release agent, such as Brownells Acra-Release, prevents the epoxy bedding compound from permanently bonding the firearm's metal action to the polymer stock. Proper application is vital to avoid a permanently fused firearm.

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