The UG-311 is a large dual railgun turret designed for mid-range anti-starship combat.

The UG-311 was designed late in 2301 by a collaboration between the Magnetic Assembly, Stellar Defense, and Atlantica Electromotive with the goal of updating the primary weapon systems of the American Union’s Statesmen class warships. The Magnetic Assembly would provide the latest in materials and space-hardened electronics developed from their existing systems. Stellar Defense would provide the railgun and power systems from pre-existing weapon programs and Atlantica Electromotive would provide many of the mechanical and motor systems for the design taken from their existing space-based infrastructure programs. This would result in a design made up from already well tested components.

By 2310, the weapon system was in place throughout the American Union and sales were opened up to PMC groups. The sheer amount of space parts available for the system make it an attractive option for many of the smaller military forces.

The UG-311 has an armored upper turret, and an unarmored lower section that is supposed to sit inside of a ship’s hull.

The upper section mounts two 100mm railguns in independently raising mounts, as well as a pair of thermal-electro-optical sensors for target acquisition. These sensors are generally only for last-moment corrections, as the target is expected to be detected and queue’d up by the ship for the weapons to fire at. The two rails of each cannon are braced by a transparent composite material that allows for easy inspection of the rails and that distinct ‘dual-rail’ cannon look.

The lower section of the turret contains the electronics for managing the weapon, capacitors that are designed to be fed by the connected ship’s power systems, and the ammunition magazine for the weapon system itself.

Ammo Capacity: 2,400 rounds in magazine

The Railgun fires a variety of 100mm slugs. Though these are typically unguided specially coated tungsten rounds, there are a range of other rounds available such as bursting rounds and railgun launched guided missiles. The reasonably high fire rate and high velocity of the projectile generally makes such specialty ammunition unnecessary.