I CALL DIBS ON THE MACHINE GUN!!!!!
I have one. Christmas gift from my boss last year.
It's not bad. Good distance, good rate of fire, fairly solid construction for Made In China. One fairly major problem. Belt feeding issues. Of the three units we tested, one had near complete belt feeding stoppage, mine gets it intermittently, and one works flawlessly. It's the mechanized star spoke thingie that advances the belt that gets jammed up. My guess (I haven't dissected one yet) is the internal gears slipped or are not engaging.
So, they are fun, but they have QC problems.