User blog comment:Echo 1/UNSC Weaponry seems unrealistic/@comment-74526-20100714214222

There are other issues other than the tech problem: Does our new particle beam weapon require more power to fire than a MAC or a rifle? Why would we want to build large numbers of highly-visible, line-of-sight anti-tank SPARTAN Laser when we have cheaper rockets and missiles, and the missiles can be fired from safely behind a hill? Why would we build our DEW-equipped ship when we could build five regular ships for the same price? Why would we give our troops laser rifles that are far more vulnerable to things like dirt, damp and EMPs than good ol' ballistic weapons? Why would we switch to laser rifles when bullets actually work quite well against the Covenant anyway? Why would our military go against centuries of tradition (this has happened many a time throughout history) and have to radically alter tactics when bullets work quite well against the Covenant?

Lots of issues.