Let’s talk History of Thompson M1a1

Published on December 4, 2019
Duration: 10:11

This video provides a historical and technical overview of the Thompson submachine gun, focusing on the M1A1 variant. Expert Steve from Top Guns explains the evolution from the earlier 1921 and 1928 models, highlighting key differences like the removal of the Blish lock and the side-mounted cocking handle on the M1A1. The discussion covers manufacturing, cyclic rates, ammunition, and combat effectiveness, offering insights into why the M1A1 became a simplified and more reliable military firearm.

Quick Summary

The Thompson M1A1 submachine gun evolved from earlier 1921 and 1928 models, featuring a simplified design with a side-mounted cocking handle and the elimination of the Blish lock for increased reliability and easier mass production during World War II.

Chapters

  1. 00:04Introduction & Rare Find
  2. 00:40Thompson Submachine Gun Overview
  3. 00:48Iconic Thompson Models (1921/1928)
  4. 01:06Development of the 1921 Thompson
  5. 01:39Evolution to the 1928 Model
  6. 01:47World War II & Great Britain's Orders
  7. 02:02Army Adoption & Subcontracting to Savage
  8. 02:22Cyclic Rate Comparison
  9. 02:35Savage's Simplified Design (M1A1)
  10. 02:50Explanation of the Blish Lock
  11. 03:19Firing from an Open Bolt
  12. 04:01M1A1 Simplification: Firing Pin
  13. 04:27M1A1 Reliability vs. Originals
  14. 04:37Military Service (WWII, Korea)
  15. 05:04Vietnam War Usage Anecdote
  16. 05:29M1A1 vs. Earlier Models in Combat
  17. 06:09Ammunition: .45 ACP Range Limitations
  18. 06:24Sight Differences (Adjustable vs. Fixed)
  19. 06:36Identifying Differences on the Shelf
  20. 06:47Title 2 Firearm & Transferable Guns
  21. 07:05Safety and Fire Selector Operation
  22. 07:33Key Visual Differences: Cocking Handle
  23. 07:54Drum Magazine Compatibility
  24. 08:11Magazine Types (Stick Mags)
  25. 08:30Distinguishing Full-Auto vs. Semi-Auto Mags
  26. 09:01Modern Attachments vs. Historical Design
  27. 09:11Wood and Steel Construction
  28. 09:23Viewer Engagement & Future Videos

Frequently Asked Questions

What are the main differences between the Thompson M1A1 and earlier models like the 1921 or 1928?

The M1A1 simplified the design by removing the Blish lock, moving the cocking handle to the side, and eliminating the vertical foregrip. Earlier models had a top cocking handle and the Blish lock mechanism to slow the cyclic rate.

Why was the Thompson M1A1 considered a more reliable firearm for military use?

The M1A1's reliability stemmed from its simplified design, which removed complex parts like the Blish lock. This made it a more robust and easier-to-maintain weapon for mass military deployment during World War II.

Can the Thompson M1A1 accept drum magazines?

No, the M1A1 Thompson was not designed to accept drum magazines. Machining differences and the impracticality of drum magazines (heavy, awkward, noisy) led to their exclusion from this variant.

What ammunition does the Thompson M1A1 typically fire?

The Thompson M1A1, like most Thompson submachine guns, is chambered in the .45 ACP pistol round. This ammunition is known for its stopping power but has limited effective range and a significant trajectory drop.

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