With a lot of the enemies MICA loves to toss at us now, MG4 mod has seen a lot more use as of late. She does, however, take a ton of investment (all her equipment, mod 3, etc) to get her to that point. Is it worth it? Probably. She's still an MG though, so she's not going to be pulled out as much as a good AR or RF.

Her ability to reduce enemy Firepower ONLY comes when equipped with SLAP rounds, which she only gets at Mod 3. Before then, meh. A major thing is that the damage reduction is at the very end of the enemy's damage calculation (because reasons) instead of the beginning, so it has more of an effect on low FP enemies than high FP ones.

Note that the bounce effect is buggy as hell, especially when the enemy dies.