If you are referring to the present, today's most powerful sub-machine gun is the H&K UMP .45 cal sub-machine gun, or the Kriss Vector SMG. if you are referring to the past however then its undeniably the Tommy Gun. also a .45 cal sub-machine gun.
about $15
Costco.
The another name for the Tommy gun is the Chicago typewriter or sometimes called the Thompson submachine-gun.
AK-74 is an assault rifle developed by the Soviet Union in the '70s, which is refined version of AK-47. A different gun, the AK-74u ("u" being short for "Ukorochenniy," the Russian word for "shortened") is a submachine gun that was adopted into service in 1979.
Factory, I'd probably say the 500 Magnum
Thompson submachine gun was created in 1919.
about $15
Best known was the STEN gun.
uzi submachine gun
No, The P90 is a Belgian designed submachine gun.
The UMP45 is the strongest, and most accurate smg in the game. I Agree Also.
Sten submachine gun
Sten (British submachine gun).
9mm submachine gun of German design, made by Heckler & Koch. Made in the 1960's. The MP5 is currently one of the most widely used submachine guns in the world. Its successor is the Heckler & Kock UMP.
Assault rifle
Costco.
The Lineup - 1954 The Submachine Gun Case - 1.18 was released on: USA: 28 January 1955