Thompson 1921: The Original Chicago Typewriter
This guide details the operation of the Thompson Model of 1921, focusing on its unique selector switches and the 50-round drum magazine. Expert Ian McCollum demonstrates the manual winding process for the drum, which uses a clock-style spring requiring 11 clicks for the 1921 model. The video also highlights the dual selector switches for safe/fire and semi-auto/full-auto modes, offering a glimpse into the internal firing cycle.









