This is done with two Spartans that both have Sniper Rifles or Beam Rifles (but only a gold Sniper Rifle will appear on the screen). Have one Spartan zoom at your face plate and visor, then walk a little to the side of the other Spartan. Then shoot his face plate. The sniper will then look gold. This is done best at the top of the Battle Rifle tower in Lockout (Halo 2 multiplayer). Also try: This may take a few tries. It may also make the sniper other colors. Note: You will have to do these operations consecutively.