M1014 shotgun

Well its the m1014 semi auto shotgun, nothing too fancy, probably. To further differentiate semi auto shotguns from their pump action brethren, I gave them the ability to burstfire to shots in quick succession, this change applied to both the two saiga-12 guns and the m1015 (please tell me if I missed others).

I also removed the never jams tag to the saiga, brief googling points out that they can indeed jam, but I am not a gun expert. 
The Benelli is not a Heavy Weapon.  This ain't Survival Crisis Z.

(And yes, you're authorized to delete the M4, 416, and the rest of the rifles there too.  Combat rifles don't belong in this group.  The M107 can stay because it's .50BMG.)