Hollow-Case Rounds

The Hollow-Case Rounds is an Enhanced-tier magazine slot weapon mod in Marathon that modifies the ammunition loaded into the weapon. Hollow-case projectiles are designed to deform or fragment on impact, which can increase damage dealt to unarmored targets while reducing penetration through hard materials. This makes the Hollow-Case Rounds mod a strong choice for engagements focused on dealing with organic targets or runners with lighter protection, where raw stopping power on impact is more valuable than armor-punching capability.

Among magazine mods in Marathon, the Hollow-Case Rounds stands out by modifying the damage profile of each round rather than purely increasing capacity or reload speed. This makes it a more situational but potentially higher-impact choice when the enemy composition is known in advance. Runners who scout ahead and anticipate lightly armored targets will extract more value from Hollow-Case Rounds than from pure utility mags. The Enhanced-tier rating means it is accessible earlier in a runner's progression than top-tier options, offering a meaningful step up in damage output at a reasonable investment level.