The Brenodi standard issue machinepistol has a high rate of fire and can empty its 30 round in under 2 seconds. However the gun is known for beeing horrible inaccurate and it lacks the stopping power needed to fight the enhanced NF soldiers.
Maybe when it was in golden-eye with that 80 round clip.. Fuck a "personal defense weapon" I want a personal offense weapon. Plus I always thought it was ugly.
Double or tripple stacked magazines would allow you to shorten the magazine somewhat and would make it easier to move around while the mp is holstered or otherwise handling it.