I don't own your gun. So the result of any mod might be different.
I have Huma mod, Altaros silencer with muzzle break. Altaros is quieter with my prophet 2 performance 6.35 cal.
I had considered STO but the response was a bit slow, so I got the Altaros instead. But I have STO Belitta years ago. And I like it. You might want to consider STO. I believe they have the shorter Flax and longer Accipiter which they can modify according to your gun tune.
Hope it helps.