this only happens in halo 2 anniversary’s multiplayer game if you’re left handed like me you can use the bumper/trigger swap configuration in the MCC Collection. Unfortunately in the anniversary version of the multiplayer whenever you dual wield weapons the right trigger doesn’t fire the second weapon it will drop the second gun and throw a grenade instead! Also in certain vehicles like banshee and ghosts the triggers switch back to default but the vehicles won’t fire their guns. NOTE THIS IS ONLY IN THE ANNIVERSARY MULTIPLAYER. Thanks