^
ew
If you need it, (Which seems to be the case, because you just looked at the picture and said 'ew'.) I'll give you a TL;DR:
It's not a serious gun. It was made to show that you can make stupid combos with this as well.
Edit: Here's a better looking non-serious gun.

It's a SMG with an assault rifle barrel + hand guard, a silencer, and a scope.
Too many attachments. Therefor, it still looks kinda stupid.
Edit2: I added another stock.

So, what would this be...
2*3(5)*4. That's big. :P
It's like, 1950.