Here's another of my deacts, its an M1928 A1 Thompson sub machine gun, it was manufactured in 1942 by auto ordinance of Bridgeport Connecticut, its new spec so no cock n click but will part strip. This was among the one's sent to russia under the lend lease agrement as part of the eqipment for inside the sherman and other tanks.( recovered 10 yrs ago from a salt mine in russia and sold to various dealer's )The M1928A1 had provisions for box and drum magazines. It had a Cutts compensator, cooling fins on the barrel, employed a delayed blowback action and its charging handle was on the top of the receiver.
The M1 and M1A1 had a barrel without cooling fins, a simplified rear sight, provisions only for box magazines, employed a straight blowback action and the charging handle was on the side of the receiver.
Over 1.5 million military Thompson submachine guns were produced during World War II.