User blog comment:Echo 1/UNSC Weaponry seems unrealistic/@comment-4731619-20100715055456

Generally, Plasma weapons, DEWs and the like are only useful against Covenant constructs (seen in Halo Wars) and even then required much power to take it down. Had it been chosen, the cheaper, more effective joy of missiles and projectiles could and would rip straight through Infantry, Vehicles, Aircraft and MACs can rip through a Covie ship when it's shield is down.