Complex sentence: The future of projectile based weapons may be found in the railgun, currently tests are underway on developing systems that could create as much damage as a Tomahawk (missile), but at a fraction of the cost.
Split into simpler sentences: The future of projectile based weapons may be found in the railgun. Currently tests are underway on developing systems that could create as much damage as a Tomahawk (missile), but at a fraction of the cost.