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When the US military released a request for what would become the M1 Carbine in 1940, the Auto-Ordnance Corporation offered up a Thompson submachine gun simply rechambered for the new .30 Carbine cartridge. This entailed a new magazine, a receiver modified for the longer magazine, and a new barrel and bolt face – but the other Thompson parts could remain unchanged form the standard .45 ACP models. This made the submission a pretty cheap and easy effort for Auto-Ordnance…which is a good thing, considering that it was almost assured to be rejected.
The stipulations for the new carbine included a weigh requirement of 5 pounds, and the Thompson weighed more than double that (in both .45ACP and .30 Carbine forms). Only a few were made, and the one submitted for military testing was rejected outright on the basis of weight. This example is serial number 1, and resides at the Cody Firearms Museum.
Thompson T2 Prototype SMG: https://www.youtube.com/watch?v=1o9q5Xh69AM
Bendix-Hyde 2nd Model Prototype Carbine: https://www.youtube.com/watch?v=JoL5pXB8Ln4
Czech ZK-383 SMG: https://www.youtube.com/watch?v=MlFdhAK5c7Q
Reising M55 SMG: https://www.youtube.com/watch?v=JVH9aEF2EX0
S&W Model 1940 Light Rifle: https://www.youtube.com/watch?v=yoeGGm_V9mw
At Forgotten Weapons I think the most interesting guns out there are the most obscure ones. I try to search out experimental and prototype weapons and show you how they work, in addition to more conventional guns that you may not have heard of before. You’re much more likely to find a video on the Cei Rigotti or Webley-Fosbery here than an AR or Glock. So, do you want to learn about something new today? Then stick around!