“Super Redneck Rat-Hunter”

While searching for a proper definition of the term “super redneck” (don’t ask why) I came across this picture of the Rat Hunter holding up a huge gun.  I have no idea exactly what make & model firearm this is.  (if you know send in a comment)  At first glance this appears to be some sort of anti-aircraft gun intended to be fired from a fixed mount and not shoulder fired.  Sometimes not knowing the full story behind a picture can lead to trouble.  This one however is just too funny when the name on the guys bug deflector is taken in to consideration. 
@QBall45

image
Super Redneck Rat-Hunter

Leave me your thoughts here