User blog comment:Echo 1/UNSC Weaponry seems unrealistic/@comment-74526-20100714210146

Nothin' you can do with a laser gun that you can do a lot more cheaply and effectively with a bullet. There are many areas in which projectiles are superior to DEWs and plasma weapons.

I'm also working on a science fiction work, and the weapons are similar to your idea: Guns for the guys on the ground, plasma weapons for the guys in space.