To be honest I'm amazed. This weapon is balanced and it's just like what I would like to see from a LMG weapon. Despite the weak damage and generous ammo pool, it's satisfying to use it as any perk (besides firebad).
Just a few things;
I want Commando to utilize its faster reload bonus with this weapon against big fellows (like Fleshpound). Just for "scientific reasons" ofc.
And Sirens being capable of hurting specimen caught in the ice with their screams.
I don't care if headshots stay with the frozen targets or not, but I prefer them to be removed (sharp already can feast upon 50% universal headshot damage bonus with this weapon) or make it so; head hitbox move to the dead center of the target when frozen.