The Streak Breaker
While falling, Jacob holding the Iron Titan Sniper Rifle, looked at the Bronze Puppet Assassin, who was agilely moving, leaving behind a red infrared streak.
The shotgun round was filled with hundreds of tiny pins made with an intermediate type-1 mineral called black razor rock, and not only that, but they were coated with Jacob's explosive cocktail, which made them blow like tiny bombs the moment they came in contact with any hard surface.
These rounds were invented by Jacob specifically for the agile enemies who were too hard to snipe, but he never released them to the public since it would draw too much unwanted attention to him.
Now, however, these things were his biggest trump cards. They were also what he needed to buy only a fraction, and it will be over because of his sharpened reflexes and the rifle's insane speed. It was a combination of sorts.