Sticky Mosin Bolt? Here's how to "Make your Mosin Rock"

Published on February 24, 2012
Duration: 12:43

This guide provides a detailed, step-by-step process for fixing a sticky bolt on a Mosin-Nagant rifle, a common issue with surplus firearms. Drawing on the expertise of Iraqveteran8888, the instructions cover chamber polishing, firing pin maintenance, bolt contact point refinement, and proper lubrication techniques to ensure smooth operation. The modifications aim to significantly improve the rifle's handling and reliability.

Quick Summary

Fixing a sticky Mosin-Nagant bolt involves polishing the chamber with JB compounds and a drill to remove hardened cosmoline. Further smoothing can be achieved by polishing the firing pin, bolt handle, and cocking piece, and lightening the firing pin spring. Proper lubrication with Ballistol and Loctite C5-A enhances smooth operation.

Chapters

  1. 00:00Introduction: Sticky Mosin Bolt Issue
  2. 00:35Tools and Materials
  3. 01:55Causes of Sticky Bolt
  4. 03:21Chamber Polishing Technique
  5. 05:38Firing Pin Maintenance
  6. 07:36Spring Lightening
  7. 08:25Bolt Contact Points
  8. 08:58Extractor Adjustment
  9. 09:34Lubrication Recommendations
  10. 10:44Tang Bedding for Accuracy
  11. 11:58Final Testing and Results

Frequently Asked Questions

What causes a Mosin-Nagant bolt to become sticky?

A sticky bolt in a Mosin-Nagant is commonly caused by dried cosmoline residue in the chamber, which hardens into a varnish-like substance. Less frequently, excessive headspace can also lead to a sticky bolt issue.

How can I smooth out a sticky Mosin-Nagant bolt?

To smooth a sticky bolt, you can polish the chamber using a drill with a bore brush and compounds like JB Non-Embedding Bore Cleaning Compound. Additionally, polishing the firing pin, bolt handle, and cocking piece, along with lightening the firing pin spring, can significantly improve operation.

What lubricants are recommended for a Mosin-Nagant bolt?

For general cleaning and lubrication, Ballistol is recommended. For high-friction areas on the bolt assembly, Loctite C5-A Copper Based Anti-Seize Lubricant is suggested for long-lasting smoothness and protection.

Is it difficult to fix a sticky Mosin-Nagant bolt?

Fixing a sticky Mosin-Nagant bolt involves several gunsmithing steps that require some mechanical aptitude and specific tools. While not overly complex, it's considered an intermediate-level task that can greatly improve the rifle's functionality.

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