Unknown (to me) carbine magazine

[imarangemaster]

Didn't auto ordnance make a prototype for submission to the carbine program in 1941? I think I have a pic. I will check the magazine!

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[shadycon]

Didn't auto ordnance make a prototype for submission to the carbine program in 1941? I think I have a pic. I will check the magazine!

In American Thunder II on pg 484 They show a protoype Thompson in .30 carbine. Just like big brother in .45. In Riesh's book pgs 1-4, the date on your mag seems to fall into the range of the first prototype's. But they only talk about 20 rd mags?