The Thompson submachine gun, a legendary firearm of the early 20th century, is often associated with its powerful .45 ACP caliber. However, a lesser-known variant exists: the semi-automatic .22 LR Thompson. While not sharing the same historical significance or battlefield prowess as its larger sibling, the .22 Thompson offers a unique and intriguing piece of firearms history for collectors and enthusiasts. This article delves into the specifics of this fascinating firearm.
Understanding the Thompson's .22 LR Conversion
It's crucial to understand that there wasn't a factory-produced .22 LR Thompson submachine gun. Instead, the .22 caliber versions are typically conversions of existing .45 ACP Thompsons. Various companies and individuals undertook these conversions throughout the years, resulting in a diverse range of variations in terms of quality and features. These conversions often involved replacing the original barrel, bolt, and magazine with .22 LR-compatible components.
Key Features of .22 LR Thompson Conversions:
- Caliber: .22 Long Rifle (.22 LR)
- Action: Semi-automatic (unlike the full-auto .45 ACP original)
- Mechanism: Generally retains the original Thompson's blowback operation, albeit adapted for the lower-pressure .22 LR cartridge.
- Magazines: These are usually proprietary to the specific conversion and are not interchangeable with original .45 ACP magazines. Capacities vary.
- Accuracy: Due to the conversion nature and sometimes lower-quality components used, accuracy can be variable compared to purpose-built .22 LR firearms.
Why Convert a Thompson to .22 LR?
Several reasons explain the popularity of .22 LR Thompson conversions:
- Reduced Cost of Ammunition: .22 LR ammunition is significantly cheaper than .45 ACP, making it more affordable for recreational shooting.
- Reduced Recoil: The lighter .22 LR cartridge produces considerably less recoil, making it easier to shoot and handle, especially for less experienced shooters.
- Training Purposes: Some use converted Thompsons for training purposes, offering a familiar platform with lower costs and recoil.
- Collectibility: For some firearm enthusiasts, owning a .22 LR Thompson is a way to own a piece of history at a more accessible price point than an original .45 ACP model.
Considerations When Owning a .22 LR Thompson Conversion:
- Quality Variation: The quality of conversion kits and craftsmanship varies greatly. Thorough inspection before purchase is crucial to ensure functionality and safety.
- Parts Availability: Finding replacement parts for converted Thompsons can be challenging depending on the specific conversion.
- Legal Considerations: Always ensure compliance with all local, state, and federal laws regarding firearms ownership and modifications.
Conclusion: A Unique Piece of History
The semi-automatic .22 LR Thompson is a fascinating firearm, offering a unique blend of history and affordability. While not as powerful or historically significant as its .45 ACP counterpart, it provides an accessible entry point for those intrigued by this iconic submachine gun. However, potential buyers should be aware of the variations in quality and the need for diligent research before acquiring one. Always prioritize safety and legal compliance when handling any firearm.
