heh true Nev, true.
You're right Oblivian, they do usually have a two man crew for that weapon. It weighs roughly 30 pounds unloaded and was originally created to penetrate armor, such as on APC's and helicopters.
Sadly, in DF:BHD, it's just used by some guy who ran for 10 minutes out on the map, turned around, and is now shooting you whenever you spawn.