11x80mm

The 11x80mm (.433) is a rimless bottlenecked rifle cartridge developed as a high-power alternative to the 7x47mm CRC, intended to fulfill the requirements for both anti-materiel usage and for heavy sniping at extreme ranges. Developed in 2096, .433 uses the same propellant and core design principles as its smaller sibling cartridge, with a solid propellant block, polymer casing, and durable parts, reducing the need for cleaning and providing a platform that can suitably fire overpressure rounds without any faults at all.

The Sol Defense Corps and Peacekeeper Corps utilize 280gr very-low-drag bullets in heavy sniper usage, with AP variants available for anti-materiel. The cartridge has a effective range of approximately 2,550 meters (7,450 meter maximum) and can be fired at up to 2,200 m/s muzzle velocity.

It is known in military designation and for serializing as the M433.

Variants

• M433: Standard FMJ widely used in normal service. Suitable for both sniping and anti-materiel.
• M433UHV: High-velocity overpressure variant made of titanium casing. Has an effective range of up to 4,200 meters and a velocity of 1,800 m/s but is extremely volatile, extremely loud, and wears down weapons quickly. Requires special chambering. Designed for very long-range engagements requiring maximum accuracy, usually on barren areas like the surface of Mars.
• M433MG: Heavy variant used for heavy machine guns. Sacrifices range for higher stopping power and increased velocity.
  • M433MG/TR: Tracer variant of M433MG, usually loaded every 5 rounds into HMGs. Coated in a red phosphorus tip.
• M433SBS: Subsonic, heavyweight projectile intended to be used with suppressors.
• M433AP: Tungsten-core armor-piercing round, intended especially for anti-materiel and for sniping armored targets.
• M433CC: Concussion round, designed to generate a shockwave upon the impact that can disorient nearby targets.
• M433HEAT: Dedicated anti-tank round issued only to special operations. Uses a miniaturized shaped charge to convert a metal liner into a high-pressure jet, puncturing vehicle armor. Much less effective than larger warheads but can be used for anti-tank sniping. The cartridge is not suitable for rapid fire and can't be loaded into machineguns.