Increased accuracy with assault rifles or machine guns
When using assault rifles or machine guns, shoot one bullet at a time instead of unloading on your opponent. Tap RB to let one bullet out instead of simply holding the button and letting loose a full-auto barrage. Tapping will ensure that you hit much more often and kill the enemy faster. You will eliminate recoil and thus hit the target 90% of the time. Go for head shots. Even when they are fully armored, a headshot can take someone out in two hits. Zoom in while aiming by clicking the Right Analog-stick. This will also improve your aim. Crouching also helps improve your aim. However, never crouch in a game where auto-aim is not allowed, as you will probably die since you cannot move, crouch, and shoot at the same time. An added benefit is that you will conserve more bullets. You will find that you only will use a whole round of ammo, and require five bullets at most to kill someone.