[PAR] [TLE] M3 submachine gun [SEP] The M3 was an American .45-caliber submachine gun adopted for U.S. Army service on 12 December 1942, as the United States Submachine Gun, Cal.  .45, M3.  The M3 was chambered for the same .45 round fired by the Thompson submachine gun, but was cheaper to produce, and lighter, although, contrary to popular belief, it was far less accurate.  This myth stems from a US army training film portraying the M3 as more accurate than its counterparts.  The M3 was commonly referred to as the "Grease Gun" or simply "the Greaser," owing to its visual similarity to the mechanic's tool. [PAR] [TLE] Thompson submachine gun [SEP] The Thompson submachine gun is an American submachine gun, invented by John T. Thompson in 1918, that became infamous during the Prohibition era.  It was a common sight in the media of the time, being used by both law enforcement officers and criminals.  The Thompson submachine gun was also known informally as the "Tommy Gun", "Annihilator", "Chicago Typewriter", "Chicago Piano", "Chicago Style", "Chicago Organ Grinder", "Trench Broom", "Trench Sweeper", "The Chopper", and simply "The Thompson".
[PAR] [TLE] M3 submachine gun [ SEP ] The M3 was an American .45-caliber submachine gun adopted for U.S. Army service on 12 December 1942 , as the United States Submachine Gun , Cal . .45 , M3 . The M3 was chambered for the same .45 round fired by the Thompson submachine gun , but was cheaper to produce , and lighter , although , contrary to popular belief , it was far less accurate . This myth stems from a US army training film portraying the M3 as more accurate than its counterparts . The M3 was commonly referred to as the " Grease Gun " or simply " the Greaser , " owing to its visual similarity to the mechanic 's tool . [PAR] [TLE] Thompson submachine gun [ SEP ] The Thompson submachine gun is an American submachine gun , invented by John T. Thompson in 1918 , that became infamous during the Prohibition era . It was a common sight in the media of the time , being used by both law enforcement officers and criminals . The Thompson submachine gun was also known informally as the " Tommy Gun " , " Annihilator " , " Chicago Typewriter " , " Chicago Piano " , " Chicago Style " , " Chicago Organ Grinder " , " Trench Broom " , " Trench Sweeper " , " The Chopper " , and simply " The Thompson " .
When was the gun invented that chambered the same .45 round as the M3 submachine gun?
When was the gun invented that chambered the same .45 round as the M3 submachine gun ?
1918
1918