I don’t think it needs a BIG nerf. Just a subtle one. Two things.
It is a death laser scoped in. Pretty quick kill time. If you get first shot on someone scoped in, you win. Just keep the spread the same scoped out and in.
The flinch makes retaliation against someone who gets first shot with an AR almost impossible. Especially if they are scoped in before you. If it didn’t cause such a hard flinch then you could potentially fight back.
Otherwise I love what’s been done with this weapon. It’s nice that full auto guns can actually get a kill now. I like the unscoped pretty tight spread and power.