If your opponent keeps getting cheap kills with the Predator Chaingun, use the following weapon combination to defeat him. First, remember that wielding the Predator makes you move slowly. However, the gun has a large clip and can deliver sherries firepower for long periods of time. Also remember that the gun's barrel must start spinning, which gives you an extra second or two to get a jump on the competition. With that in mind, find an armor jacket, as you will not last long in the barrage of bullets if they get the jump on you. Then, get two HS-90s. They have the fastest rate of fire in the game. Fire both of them directly into your opponent. You may be successful with just one if you sneak up behind them. However if you use two, you will mow them down before they can pull off a shot.