Garand Headspace Check; Anvil 114

Published on July 14, 2022
Duration: 17:28

This guide details the process of checking headspace on an M1 Garand after replacing the bolt. It emphasizes the importance of using go and no-go gauges to ensure the chamber dimensions are within safe operating tolerances. The video demonstrates the correct procedure, highlighting that a properly functioning Garand bolt should close on a go gauge but not on a no-go gauge, preventing potential safety issues.

Quick Summary

Performing an M1 Garand headspace check after bolt replacement is vital for safety. Use go and no-go gauges: the bolt should close on the 'go' gauge (e.g., 2.048 inches) with slight resistance, but must not close on the 'no-go' gauge (e.g., 2.054 inches) to ensure proper chamber dimensions.

Chapters

  1. 00:00Introduction: M1 Garand Bolt Replacement
  2. 00:23Headspace Check Overview
  3. 01:10Reason for Bolt Change
  4. 01:52M1 Garand Tool Explanation
  5. 02:31Bolt Disassembly (Extractor/Ejector)
  6. 04:19Go Gauge Headspace Check
  7. 05:02No-Go Gauge Headspace Check
  8. 05:33Interpreting Results
  9. 06:17Bolt Reassembly Details
  10. 08:06M14 vs. M1 Garand Design Differences
  11. 09:09Garand Gas System
  12. 09:15M14 Gas System
  13. 10:24M1 Carbine Gas System
  14. 11:09Firearm Comparisons
  15. 11:45Bottom Metal Differences
  16. 12:13M1 Carbine Trigger Simplicity
  17. 12:39John Garand's Trigger Genius
  18. 14:27Mike's Online Presence
  19. 14:54Live Firing Test
  20. 15:11Loading the Garand Safely
  21. 15:22Firing First Round
  22. 15:47Post-Firing Inspection
  23. 16:05Dumping Remaining Rounds
  24. 16:41Conclusion: Successful Headspace Check

Frequently Asked Questions

What is the primary reason for checking headspace after replacing an M1 Garand bolt?

Checking headspace after replacing an M1 Garand bolt is crucial to ensure the firearm's safety and proper function. It verifies that the distance between the bolt face and the chamber's rear is within specified tolerances, preventing potential catastrophic failures or malfunctions.

How do you perform a headspace check on an M1 Garand?

To perform an M1 Garand headspace check, you'll need go and no-go gauges. First, ensure the rifle is unloaded. Then, close the bolt on the 'go' gauge; it should close with slight resistance. Next, attempt to close the bolt on the 'no-go' gauge; it must not close or go into battery.

What are the typical dimensions for M1 Garand headspace gauges?

While specific dimensions can vary slightly by manufacturer, the video mentions a 'go' gauge of 2.048 inches and a 'no-go' gauge of 2.054 inches. The difference between them is six thousandths of an inch, which is a standard increment for headspace checks.

Why is it important that the 'no-go' gauge does not fit into the M1 Garand chamber?

The 'no-go' gauge not fitting into the M1 Garand chamber is critical for safety. If it were to close, it would indicate that the chamber is too long, potentially leading to excessive headspace. This condition can cause cartridge case head separation or other dangerous malfunctions.

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