Mossberg 930 shotgun- Complete cleaning and disassembly with Jerry Miculek

Published on May 8, 2014
Duration: 22:51

This guide details the complete disassembly and cleaning of the Mossberg 930 JM Pro-Series shotgun, presented by expert Jerry Miculek. It covers essential safety checks, step-by-step removal of components including the trigger housing, barrel, and bolt assembly, detailed cleaning of the gas system and internal parts, and proper reassembly. Miculek emphasizes meticulous cleaning of the gas piston and barrel to ensure reliable cycling, especially after high-volume shooting.

Quick Summary

Expert Jerry Miculek provides a comprehensive guide to disassembling and cleaning the Mossberg 930 JM Pro-Series shotgun. Key steps include ensuring the firearm is unloaded, removing the trigger housing, barrel, and bolt assembly, and meticulously cleaning the gas piston system and barrel chamber to guarantee reliable performance.

Chapters

  1. 00:00Introduction and Safety Check
  2. 01:21Trigger Housing Removal
  3. 02:26Magazine Extension and Barrel Clamp
  4. 03:34Forearm and Barrel Disassembly
  5. 04:31Bolt Assembly Removal
  6. 05:38Cleaning Internal Components
  7. 07:19Gas Piston Maintenance
  8. 10:34Barrel and Gas Cylinder Cleaning
  9. 11:12Reassembly Process
  10. 13:36Final Assembly and Lubrication

Frequently Asked Questions

How do you safely disassemble a Mossberg 930 shotgun?

Begin by ensuring the shotgun is unloaded. Remove trigger housing pins, then loosen the barrel clamp and unscrew the magazine extension. Remove the forearm, then the barrel and piston assembly. Finally, remove the bolt assembly. Always prioritize safety checks throughout the process.

What are the key components to clean on a Mossberg 930?

Focus on the gas piston and its cylinder, as carbon and wad buildup here significantly impacts reliability. Also, thoroughly clean the bolt assembly, trigger group, and barrel chamber to ensure smooth operation and prevent malfunctions.

What tools are needed for Mossberg 930 maintenance?

Essential tools include a bench block, punch, Allen wrench, shop rags, and solvents. Specialized brushes for the gas cylinder and a small screwdriver for piston rings are also highly recommended for effective cleaning.

Why is cleaning the gas piston important on a Mossberg 930?

The gas piston is the 'heart and soul' of the shotgun's operation. Accumulation of carbon, lead, and plastic wad residue can impede its function, leading to cycling issues and potential failures to fire or eject.

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