Shooting the Thompsons: Comparing the 1921, 21/28, and M1A1

Published on October 17, 2018
Duration: 7:05

Ian McCollum, demonstrating high expertise, provides an in-depth comparison of three Thompson submachine gun variants: the M1921, 1921/28 Overstamp, and M1A1. He analyzes how design changes, particularly to the rate of fire and ergonomics, impacted shootability and controllability, concluding with his personal preference for the M1921's shooting experience.

Quick Summary

Ian McCollum analyzes three Thompson submachine gun variants: the M1921, 1921/28 Overstamp, and M1A1. He highlights how design changes, particularly rate of fire (960 rpm for M1921, 830 rpm for 1921/28, 655 rpm for M1A1) and features like the Cutts compensator, affect controllability. The M1921 is favored for its shootability.

Chapters

  1. 00:00Introduction and Thompson Evolution
  2. 01:17Shooting the M1921
  3. 02:15Shooting the 1921/28 Overstamp
  4. 03:07Shooting the M1A1
  5. 04:39Final Assessment and Auction Info

Frequently Asked Questions

How did the rate of fire change between Thompson submachine gun models?

The Thompson M1921 fired at approximately 960 rpm. The 1921/28 Overstamp was modified to reduce this to about 830 rpm, and the M1A1 variant had the slowest rate of fire at 655 rpm. These changes reflect a design evolution aimed at managing the firearm's performance.

Which Thompson submachine gun variant is considered the most controllable?

According to Ian McCollum, the original M1921 is surprisingly controllable despite its high rate of fire, largely due to its weight and features like the Cutts compensator. The M1A1, with its slower rate and lack of a compensator, was found to be the hardest to control.

What role does the Cutts compensator play in Thompson SMG performance?

The Cutts compensator on models like the M1921 and 1921/28 significantly aids in controlling muzzle rise and recoil. Its absence on the M1A1 is noted as a contributing factor to its reduced controllability compared to the earlier variants.

What are the key ergonomic differences between the Thompson M1921 and M1A1?

The Thompson M1921 features a vertical foregrip, contributing to its perceived controllability. In contrast, the M1A1, the iconic WWII variant, is distinguished by its horizontal foregrip, which, along with the lack of a Cutts compensator, impacts its handling characteristics.

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