Well lets see. I bought the ruin wings for the heavy ammo perk. I also have a corrective measure that holds 3 mags of 100 rds of heavy ammo. It also has the perk "expect to find more ammo for this wep". So I have unlimited heavy ammo. Now if I could only find an upgraded 2.0 version of the same machine gun I would be set. I always used the armamentarium before but who cares about an extra grenade when you have unlimited heavy ammo.