The Ice Breaker takes a while to replenish ammo and also has a lot of recoil. It's in no way "overpowered," plenty of legendary sniper rifles outperform it.
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Every single person that uses "OP", "nerf" and "no skill" on the same sentence are morons that don't know what they are talking about. They just love to think they are the best and hate to see that illusion shattered when they get killed by something that they either don't have or suck at using.