Usage by the MarinesEditThe M3 is only seen being held by an Army Intelligence officer watching over 3 captured Japanese soldiers in Okinawa. It never makes an apperance again. Not seen in hands of any Marine in the series. In reality they were used by Marines, although just like guys in the Army, they much preferred the Thompson because it appeared much more reliable.
- It is the least seen weapon in the series, and it has not been seen used by any of the major characters.