: Different mods and weapon classes have varying "Penetration Values" (ranging from Low to High), determining how many zombies a single bullet can pierce.
The most significant modifications occur at the Pack-a-Punch machine , where players can spend to upgrade their current weapon. An upgraded weapon receives: Project Lazarus | Gun Mods
: The weapon is renamed and often gains a new visual appearance. Notable Weapon Modules : Different mods and weapon classes have varying