Thompson's .30-06 1923 Autorifle: Blish Strikes Again

Published on August 22, 2018
Duration: 16:21

The Thompson 1923 Autorifle, a contender in the 1924 US military rifle trials, utilized the Blish principle for delayed blowback operation. Despite its innovative design, it suffered from significant drawbacks including violent ejection, a need for oiled cartridges, and a complex, heavy, and poorly balanced construction. Ultimately, a bolt failure during an endurance test sealed its fate against the more practical Garand.

Quick Summary

The Thompson 1923 Autorifle, developed by General John Thompson and manufactured by Colt, was a candidate in the 1924 US military trials. It used the Blish principle for delayed blowback but suffered from violent ejection, required oiled cartridges, and was heavy and complex, ultimately failing an endurance test.

Chapters

  1. 00:00Introduction: Thompson 1923 Autorifle
  2. 02:08Rifle Variants and Magazines
  3. 03:21The Blish Principle and Mechanism
  4. 06:39Ejection and Design Flaws
  5. 08:49Manufacturing and Markings
  6. 13:26Trial History and Failure

Frequently Asked Questions

What was the Thompson 1923 Autorifle?

The Thompson 1923 Autorifle was an autoloading rifle candidate for the US military's 1924 service rifle trials. Developed by General John Thompson and manufactured by Colt, it featured the Blish principle for delayed blowback operation.

How did the Blish Principle work in the Thompson 1923 Autorifle?

The Blish principle functioned as a delayed blowback system. It relied on the theory that dissimilar metals under pressure would 'stick,' and practically used the bolt handle's angle to create mechanical disadvantage, delaying bolt opening until pressure dropped.

What were the main drawbacks of the Thompson 1923 Autorifle?

Key issues included violent ejection, a need for oiled cartridges for reliability, a heavy and poorly balanced design, and a complex, potentially dangerous disassembly process. These factors made it impractical for military use.

Why did the Thompson 1923 Autorifle ultimately fail in military trials?

Despite its innovative design, the rifle suffered from significant practical flaws. Its ultimate failure came during an endurance test when the bolt broke after 1,106 rounds, proving less reliable and practical than competitors like the Garand.

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