How to unlock the CR-56 AMAX in Warzone The CR-56 AMAX was added during Modern Warfare’s Season 4 update, so it can’t be unlocked through normal levelling. Instead, you’ll need to carry out a challenge that’s far easier in Modern Warfare’s multiplayer modes but is still absolutely doable in modes like Plunder. Get 3 gunbutt kills while using an assault rifle in 15 different matches is the task, and our friends over at Metabomb have some tips on achieving this more easily. Best CR-56 AMAX loadout in Warzone For high-damage ranged assault rifling, the CR-56 AMAX is extremely popular with the more high-skill players. Once you have the recoil under control it feels absolutely fantastic to take chunks out of the enemy health bar at long ranges, so give this thing a shot if you want a really strong and high-damage weapon.