RE: whats your favorite automatic weapon?
For up close real world work it would have to be my M16 lower with rate reducer and the 9mm integrated suppressor upper. Controlable rate of fire and no hearing loss in a building or stair well. I like the MP5 ,but the 16 lower unit allows for caliber changes by simply swiching upper units.
For fun it would have to be the MAC-11 with its rate of fire (1200rpm) its a bullet hose and not much larger than a colt 1911. The Glock 18's are also a blast.