I’m not sure if this is accurate information, I got this online with “WarHistoryOnline” , but they had a short piece about the price of the Thompson Submachine gun, at the beginning of the war , the British, not having a SMG, ordered 107,000 Thompson smg’s , with contracts totaling $21 million , making a single Thompson $200 dollars a gun, cost reduction was pursued through simplified design, with the 1942 design down to $70/gun, and by 1944 , $45/gun, This was still a costly gun, and the Brits and Canada started manufacturing the Sten gun,as early as 1941 , I read , a Sten cost $25 to make in Canada, the US designed the M3 Grease gun, using stamped materials, as was the Sten
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