I picked up a legendary minigun with the explosives perk, where every shot adds AOE explosive damage. This gun with full Heavy Gunner perk maxed out and tri barrel does 80 dmg and is just a blast to use. Limbs go flying every where. Not very good in CQB tho as I killed myself once by shooting some ghouls that got a little to close.

That is what the shreader attachment is for silly.