World War Two Heats Up: The M1928A1 Thompson SMG

Published on October 11, 2018
Duration: 17:11

This video details the evolution of the M1928A1 Thompson SMG during WWII, focusing on production changes driven by wartime demand and cost-cutting. It covers corporate shifts at Auto-Ordnance, the transition from early models with Lyman sights and finned barrels to simplified versions with fixed sights and horizontal grips. The discussion also touches on finish changes to 'Dulite,' magazine adoption, and the massive production scale-up.

Quick Summary

The M1928A1 Thompson SMG underwent significant design simplifications for WWII mass production, including replacing adjustable Lyman sights with fixed L-brackets and vertical foregrips with horizontal ones. Finishes changed to 'Dulite,' and cost-cutting measures removed barrel fins and compensators.

Chapters

  1. 00:00Historical Context & Leadership Changes
  2. 02:04Russell Maguire & Corporate Shift
  3. 04:01WWII Production & International Contracts
  4. 06:34Finish and Markings Evolution
  5. 10:28Design Simplifications for Mass Production
  6. 12:20Late-War Modifications
  7. 13:32Magazine Evolution & Production Scale

Frequently Asked Questions

What were the key design simplifications made to the M1928A1 Thompson SMG for mass production during WWII?

For mass production, the M1928A1 saw simplifications like replacing the adjustable Lyman rear sight with a fixed L-bracket sight and swapping the vertical front grip for a simpler horizontal one. These changes aimed to speed up manufacturing and reduce costs while largely maintaining the internal mechanisms and a 600 RPM rate of fire.

How did the finish and markings of the M1928A1 Thompson change during WWII?

The M1928A1's finish transitioned from the high-gloss blue of earlier models to 'Dulite,' a flat gray finish applied over sandblasted surfaces. Markings evolved to include 'U.S.' and 'A1' designations, often influenced by Lend-Lease requirements. Savage-produced guns can be identified by an 'S' prefix in their serial number.

What late-war modifications were implemented on the M1928A1 Thompson to cut costs?

Late-war cost-cutting measures on the M1928A1 included removing barrel fins, deleting the Cutts compensator, and using smooth instead of checkered control levers. A reinforcing bolt was often retrofitted to the stock post-production to prevent cracking, though this was typically a military modification.

How did the production scale of the Thompson submachine gun change during WWII?

Production of the Thompson submachine gun dramatically increased during WWII. Auto-Ordnance went from producing around 15,000 guns over 20 years pre-war to manufacturing over a million M1928A1s in just two and a half years to meet wartime demand.

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