Adding tier four items to grounded

I think it would be a great idea to add another tier to weapons and armor in grounded. The weapons and armor need to be very overpowered, but there’s a catch. I feel like tier four items need to be very exclusive, meaning they could not be duplicated or crafted. You must find them in various locations around the map. Since they have to be overpowered, I think the design for the weapons and armor should be toy related, because they are exclusive. It’s just a thought and something I would like the game to have in the future.