There are many ways to quick scope noobs in halo, I am going to tell you about a couple of them. So first you have to get out whatever weapon you want, for example a magnum, hen you go and hit behind a red barrel. They are found on the rig map, among a couple of others. Then you have to look for people. Make sure you don't shoot the red barrel yet though, because you want to save the over shield buff that it gives you until later. The overshield buff lasts 5 minutes, but you have to stand right in the blast zon- I mean red barrel, to get the buff. Then you have to quick scope noobs. The way you do this is hiding behind the red overshield barrel and quick scoping noobs. The way you do this is pressing the smart link button and quick scoping noobs, but you do this by looking at the reticle and aiming down sights so you can quickscope noobs by pressing the right trigger button quickly. Finally u hafe to shoot the red barrel while sitting on top of it. Then you will become invincible