Used in Fortresses or planetary bases as stationary artillery pieces, the 300mm Railgun is the most second most powerful Railgun used in planetary situations. Used for both indirect and direct fire operations, the 300mm gives a base long reach against enemies trying to siege it. These newer models are contracted to be placed mass-produced in AF 260 (YE 31).
Primary Role: Artillery Support Secondary Role: Anti-Ship Range: 1000 kilometers Rate of Fire: One round per ten seconds Muzzle Velocity: Varies between 3000 and 10000 meters/second
| Ammunition | Damage Rating | Description |
|---|---|---|
| 300mm x 1200mm AOE Plasma Shell | 2 SDR | Area of Effect, Super-heated Ammunition |
| 300mm x 1200mm Canister | 0 | Carries Smoke, Chemical, or Biological Payloads |
| 300mm x 1200mm Compressed Antimatter Shell | 3 SDR | Super-heavy Ammunition, not for use on inhabitable worlds. |
| 300mm x 1200mm Concentrated Plasma Shell | 3 SDR | Super-heated Ammunition |
| 300mm x 1200mm EMP Shell | 0 | For disabling non-hardened electronics |
| 300mm x 1200mm Tactical Fusion Warhead | 3 SDR | Nuclear Ammunition, not for use on inhabitable worlds. |
| 300mm x 1200mm Tungsten-Carbide Spike | 2 SDR | Standard, direct-fire Ammunition |