- Main article: Halo: Reach
Swap Meet (10 ) (N/A)
To trade weapons with a AI ally (Not a Sparton, a normal UNSC trooper), you must press and hold X near them. If they are not facing you, hold X and they will turn around to face you to swap weapons. You cannot swap weapons if you have no ammo for that particular gun. It is okay if it has low ammo, but cannot be completely out. This is probably easiest and quickest at the start of the second playable mission. After jumping out of the Falcon with Kat, meet one of the soldiers and swap with him before the Elites move up within range. If the trooper takes any damage, you must start again, so make it quick.