M1928/A1 Thompson. Posted: February 14, 2025 | Last updated: March 8, 2025. The design by General John J. Thompson was complicated yet reliable. It utilized the Blish Lock to delay the opening of ...

As World War II developed, engineers found ways to simplifying the Thompson submachine gun, and later M1 and M1A1 Thompsons were easier and less-expensive to produce.

Continuing its line of realistic CO2-powered replicas, Umarex has a new addition to the Legends line: the M1A1 submachine gun based on the famous Thompson design.