Navy 7.62mm NATO Conversion M1 Garand - Mk2 Mod1

Published on November 22, 2017
Duration: 8:47

The US Navy converted M1 Garands to 7.62mm NATO as the Mk2 Mod1 due to reluctance to fund new M14 rifles. Early Mk2 Mod0 conversions using chamber plugs failed, leading to the Mk2 Mod1's adoption of new 7.62mm barrels. These conversions required opening the gas port and adding a magazine spacer to prevent .30-06 loading. Authentic Mk2 Mod1 rifles can be identified by specific barrel markings and are best verified with CMP documentation.

Quick Summary

The US Navy converted M1 Garands to 7.62mm NATO as the Mk2 Mod1 to save costs on new M14 rifles. This involved replacing barrels, opening gas ports, and adding magazine spacers. Authentic rifles have specific barrel markings like '7.62 NATO' and manufacturer codes.

Chapters

  1. 00:00Introduction to the Mk2 Mod1
  2. 00:36Historical Context: Why Convert?
  3. 01:15The Failed Mk2 Mod0 Conversion
  4. 02:07The Mk2 Mod1 Solution: New Barrels
  5. 03:30Technical Modifications Explained
  6. 04:14Identifying Authentic Mk2 Mod1 Rifles
  7. 05:50Service Life and Usage
  8. 06:20Collector Advice & Verification

Frequently Asked Questions

What was the purpose of the US Navy's Mk2 Mod1 M1 Garand conversion?

The US Navy converted M1 Garands to the 7.62mm NATO cartridge as the Mk2 Mod1. This was primarily to avoid the expense of procuring new M14 rifles in the late 1950s, utilizing existing M1 Garand platforms instead.

How did the Mk2 Mod1 differ technically from the earlier Mk2 Mod0 conversion?

The Mk2 Mod0 used chamber plugs, which proved unreliable. The Mk2 Mod1's successful approach involved replacing the entire barrel with a new one chambered for 7.62mm NATO, along with opening the gas port and adding a magazine spacer.

How can one identify an authentic US Navy Mk2 Mod1 M1 Garand?

Authentic Mk2 Mod1 rifles are identified by specific markings on the barrel, typically found under the operating rod. These markings include the manufacturer (e.g., SA, H&R, AMF), the date of manufacture, and '7.62 NATO'.

What are the key modifications made during the Mk2 Mod1 conversion?

The Mk2 Mod1 conversion involved fitting a new 7.62mm NATO barrel, opening the gas port to handle the cartridge's pressure, and installing a white plastic spacer in the magazine well to prevent the accidental loading of .30-06 ammunition.

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