The debate over which WWII submachine gun was the best can be quite a heated one, as each of these iconic weapons— the Sten, the Thompson, the Grease Gun, and the MP40—had its unique strengths and flaws, each catering to different needs on the battlefield.
The Sten, with its unmistakable minimalist design, was a favorite among British and Commonwealth forces. It was incredibly simple and inexpensive to produce, which made it ideal for mass production during wartime. Its open-bolt operation and simplicity sometimes led to reliability issues, but its lightweight and compact size were highly valued in close quarters and urban combat situations.
The Thompson, or "Tommy Gun," was well-known for its robustness and firepower. With a high rate of fire and accuracy, it became a favorite among American soldiers and was revered for its durability and performance. Its heft and the complexity of its manufacturing process made it more expensive and heavier than its counterparts, which was a significant drawback when mobility and quick production were crucial.
Then there’s the Grease Gun, officially known as the M3. This American submachine gun was designed to replace the more expensive Thompson. Its design was intentionally crude, resembling a mechanic's grease gun, hence the nickname. Despite its unassuming appearance, it was highly effective due to its simplicity, ease of production, and reliability. It was particularly appreciated for its lightweight and straightforward maintenance.
The MP40, used by German forces, is often highlighted for its innovation and effectiveness. Its design allowed for controlled, accurate bursts of fire, and its folding stock made it handy for paratroopers and vehicle crews. The MP40’s ergonomics and reliability in various combat conditions were strong points, and it became one of the most influential submachine guns of the era.
