Some while back a Class 3 dealer buddy of mine brought out a Thompson (100% condition) and an M3A1 Grease Gun for our shooting enjoyment. I found the M3A1 even more difficult to control than the Thompson. The open breech trigger pull is at least 15 lbs and the gun is so light and non-ergonomic that it would be useful at only very close range. I think they were issued as tank guns because of their small size. Don't laugh please, I'm not a sub-machinegunner by any means. Notice the "trigger jerk" after the last round. Strange little gun.
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