In Battle for Lost Angeles hosted by DesertFox Events last March, they define a new class of player called the "SMG Class"... "The SMG class for Desert Fox Events is a player who uses a pistol caliber airsoft gun, such as an mp5 or ARP9, that fires under 1 joule with a .25g BB.  This player also has no MED and can fire full auto. Players using the SMG class may also choose between carrying 10 mid caps or 1 drum magazine not to exceed 1500 BB's.