: Significant boosts to damage, range, magazine capacity, and reserve ammunition.

: Players can customize weapon appearances with various skins in the Armory .

Beyond the Pack-a-Punch machine, players can modify their experience through:

: Different mods and weapon classes have varying "Penetration Values" (ranging from Low to High), determining how many zombies a single bullet can pierce.

: The weapon is renamed and often gains a new visual appearance. Notable Weapon Modules

: Every upgraded gun gains a specific Pack-a-Punch Module that adds a unique gameplay effect.