Apparently, not even the hero:A Hero could as it can fire a MG at Full FP (A15.23), I would suppose multiple SMC (Ldrs) could also if all manning the same MG thus being fully manned.
The first thing I had my people leave behind on a combat mission [EXC: the SAT Phone]. (Hated the D@#$! things! Too much of a distraction).Two sms are enough to man a cellphone too.