www.deadm.com

this is based on a real gun that can shoot 1million rounds a minute
it shoots a 40mm bullet or grnade witch accounts in area affect


but i think you would plant it on the ground or somthing not floating but like maybe on the wall

advantages
-it shoots really fast
-good for takeing out crowds out people with big area affect
-you can leave it some were (bomb site)
-wont get hurt if destroyed
-1 hit=kill

disadvantages
-shoot fast and cant reload(wase bullets easily)
-cannot swive so can be shot from behinde
-low helth like 20
-low arch of fire radis like 40 of 35