I have the combat rifle in my inventory and I also have 3 ammo types for it as well, normal, armor piercing and EMP. However I am only able to use the normal and AP rounds, not the EMP. I even removed the AP ammo from my inventory and I still cannot use the EMP ammo as well. All of these are indeed meant for this rifle so I am unsure why I cannot use all three types instead of just the two. When I go to my inventory also and try to customize my weapon, the EMP ammo isn't even an option yet the other two are.
Am I the only one with this issue while playing it in the Xbox one?