It as strong as a 3rd perk because of how it interacts with the Heat Mechanics. I'm paraphrasing, [Sustained dmg increases dmg AND loads ammo from reserves] The enhanced version loads more ammo. What does this mean for Heat Weapons? It means dmg with the weapon cools the weapon. And this factor... synergy is made better via the Heat Generated and the Cooling Efficiency stat. What this allows for practically speaking, are heat weapons that fire forever. 2 example of must have weapons. B7 with Firefly Adagio Accelerated Assault B7 w Firefly Headstone/Crystalline Adagio is particularly potent because now you have the best 140 in the game. Slowing down the RoF benefits Heat Weapons. And then the second variant is made for add clear. And if you build into it with the weapons stat, a special weapon. 😇👍💠