https://mwo.nav-alpha.com/mechlab?b=ac8eeb52_ON1-IIC-CS The mechDB build is for the IIC-C(S), but it's identical to the IIC-C anyways. The TAG is optional, I just like having it to go pew pew like it's a cat laser. Always double tap (-25% Jam chance), pray your ammo doesn't start cooking off, and override for when you start sending ATMs downrange. Ideally stay within 400 meters for full ATM damage, but I found 500 was the sweetspot between facetanking and UAC spread. Why is there 7 tons of ammo that total to like 1600 combined damage? Because this machine chews through ammo, and spits out damage like sunflower seeds.
