In , a popular zombie survival game on Roblox, "gun mods" primarily refer to the transformative upgrades available through the Pack-a-Punch machine and weapon customization in the Armory . Unlike traditional attachment systems, these modifications fundamentally change a weapon's stats, fire mode, and unique abilities. The Pack-a-Punch System
Beyond the Pack-a-Punch machine, players can modify their experience through: Project Lazarus | Gun Mods
: Switches the handgun to fully automatic and increases player movement speed by 15%. In , a popular zombie survival game on
: Provides a 20% chance on kill to regain ammo and increases handling speed as the magazine empties. Project Lazarus | Gun Mods
: Nails stick to targets and detonate after a delay. Stacking seven nails creates a massive "super detonation".