It would be my new reverse thruster if it was firing 500 KG bullets.
2. Railguns such as we have in ED and other settings are always recoiless. The ferrous slugs are inducted out of the weapon's barrel by electro magnets, not pushed out violently by a chemical charge as with conventional ammo. So there is no opposing force pushing the weapon platform backwards.
Hope this helps =)
It would be my new reverse thruster if it was firing 500 KG bullets.
Well it might get us over the silly 400-450 m/s speed limit that we're stuck with. Even a piddly Saturn V could manage 11,000 m/s (25,000 mph)!