Latest time I can use the Arena Req Pack?

Games Halo 5: Guardians
1

Hello,
I am planning on purchasing the Arena Req Bundle soon, but I want to grind out some more silvers first to get better stuff out of it. I would like to know when the latest time I can use it.
Thanks

2

Does anybody know?

3

The REQ packs should stay in your inventory forever unless someone has proven that they can expire.

4

But if I buy it don’t I have to open it immediately?

5

NO, the 2 packs still showing up in your inventory