MAC, Ingram & Cobray Model M11/NINE
It has Semi and full auto switch and is has one of the worlds fastest firing rate as a small "smg" or so.
Ingram M10/M11 submachine gun
"Gordon Ingram created a series of submachine gun models that resembled the Thompson Submachine Gun outwardly. Unlike the Thompson, however, these guns required a minimum of machining and were simple to operate. This gun is little larger than a conventional pistol but has a telescoping/folding metal stock and a front strap for aid in controlling the gun. The bolt telescopes around the barrel which extends back into the gun to just in front and above the magazine well. Two chamberings of the M-10 were offered, one in 9mm Luger and the other in .45 ACP.
Later Ingram created an even more compact version of the gun, the Model 11, chambered for .380 ACP. All models fire with extremely high cyclic rates. A number of other variants of the M-10 have since been produced including the M-11/9 (a compact 9mm version of the M-11) and semiautomatic "assault pistol" versions of the gun. All of these efforts met with varying success, and the original goal of Ingram, to create a viable military submachine gun, has never been realized. The military never became more than mildly curious about the super-compact submachine guns and has instead opted for "chopped" rifles like the AR-15 variant, the M4 Carbine, or the Heckler & Koch MP 5 submachine gun. About 10,000 guns were made, but relatively few have ever been used by regular military forces."
Muzzle velocity:
Model 10: 280 meters/second & Model 10 Parabellum: 360 meters/second
Model 11: 293 meters/second
Rate of fire (cyclic):
Model 10: 1145 rounds/minute & Model 10 Parabellum: 1090 rounds/minute
Model 11: 1200 rounds/minute <- do the math if you can