The Sub Assault Rifle is a weapon slightly smaller than your average Carbine, that fires an ammunition that is hybridized with either the length and width of the Assault Rifle or Submachine Gun's ammunition; in turn making it a whole new weapon.
The very first Sub Assault Rifle ever designed was the M-50; a Sub Assault Rifle with pin point accuracy and the manuverability of the P90 Submachine Gun. This weapon also uses a new and improved ammunition; the 5.56x19mm NATO (A hybrid between the M-16's 5.56x45mm NATO and the MP40's 9x19mm Parabellum) and it is just as powerful. The weapon also utilizes a secondary select system, which instead of switching fire modes,It switches between the either activation or deactivation of the barrel's built in suppressor.
After The M-50