User blog comment:LilyheartsLightning/Citadel and Reckoning DLC announced/@comment-24174486-20130225174706/@comment-1786741-20130225183908

Those are LASER swords, big difference from regular swords. Plus, Jedi can deflect freaking lasers and Elites mainly use them for stealth in combat. WH40K is just WH40K so anything can go there.