The Mark 55 is a shoulder-fired rocket launcher, the standard issue heavy weapon of the Mobile Infantry. The M55 fires a range of purpose-built 74mm warheads, including but not limited to HEAT, HEDP, white phosphorus, and the TON-SM “Phantom”, or tactical oxygen nuke. This Smart Missile creates a large, blindingly bright fusion explosion with no nuclear fallout. The Phantom is deployed safely at ranges only beyond 200 metres. The launcher has a built-in 6x optic sight.
The weight and size of the M55 means that operators are typically restricted to light ammo loads and carbine-style primary weapons.
Nearly as characteristic of the Mobile Infantry as the Morita rifle itself, the Mark 55 has been the standard issue multipurpose heavy weapon for the infantrymen since before the First Bug War. Awesome firepower and unwavering reliability have secured this weapon’s place as a fan favourite among troopers, despite many revisions received over its four decades of service.
Originally featuring onboard laser guidance and a built-in propulsion mechanism, these designs have been removed, and the standard warheads have been redesigned. They are now rocket-propelled and carry larger payloads, with the consequence of a significantly increased gross weight. FedCom and SICON both hail these changes as beneficial to operational efficiency and safety.
The HEDP (High Explosive Dual Purpose) warhead has a large blast radius and reasonable light-armour penetration. It is used for destroying buildings, light vehicles, and exploding clusters of enemy troops or bug hordes. The HEDP-B variant has a larger blast radius, but with lower penetration.
The HEAT (High Explosive Anti-Tank) warhead is very penetrative, and is mainly used against armored targets as tankers, royals, and tanks.
The TON (Tactical Oxygen Nuke) warhead is a miniature nuke for normal infantry rocketeers to fire. TONs are used for destroying underground bug networks, but can also be rigged for surface detonation. Caution must be used if the nuke is rigged for surface detonation, as the bright light can cause temporary blindness. The nuke also has a 300 meter safety trigger, and will not arm within that range, to reduce friendly fire incidents.
The smoke warhead is used to provide concealment for friendly forces moving about on the battlefield, and to 'smoke out' enemy positions, denying them breathable air and visibility.