Thompson submachine guns served with British troops during World War II.
After World War I, Thompson became very interested in, if not obsessed with, the concept of a “trench broom,” as he called it, for close-quarters fighting.
Turn your Ruger 10/22 into a semi-auto .22 Thompson machinegun clone.
Auto-Ordnance Thompson 1927 A1 SBR Review
The History of the Thompson Submachine Gun