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












