: Different mods and weapon classes have varying "Penetration Values" (ranging from Low to High), determining how many zombies a single bullet can pierce.
Upgraded weapons (also known as "PaP'd" versions) feature specific functional changes: Project Lazarus | Gun Mods
: Perks like Mule Kick (4,000 points) allow players to carry a third modified weapon, further expanding tactical options. : Different mods and weapon classes have varying