Thompson SMG in 30 Carbine
This video from Forgotten Weapons, hosted by Ian McCollum, details an experimental Thompson SMG chambered in .30 Carbine. Despite resembling a 1928 model, its rejection by the Ordnance Department was primarily due to its excessive weight (10-12 lbs unloaded), far exceeding military requirements for the M1 Carbine trials. The firearm's unique prototype status is highlighted by its serial number '1' and proprietary magazine.











