Not yet, although it may at some time in the future.
The ray gun is by far the best.
There are some different applications for plasma torches (or plasma arc or plasma gun) including plasma cutting, plasma spraying and plasma and waste disposal.
It is the super heated ionized gas. Also halo uses them.
Scare Tactics - 2003 Plasma Gun was released on: USA: 5 March 2003
PLASMA Burst
in general, a plasma consumes more power.
Plasma Pistol, as it is in about all Halo games.
plasma rife or a fuel rod
halo combat evolved: m6d pistol , ma5b assault rifle , m9 he-dp grenade , m90 shotgun , s2 am sniper rifle , m19 ssm rocket launcher, m41 laag , plasma rifle , plasma pistol , needler , plasma grenade. halo 2: smg , battle rifle , particle beam rifle , brute shot , carbine , energy sword , machine gun turret , magnum , needler , plasma rifle , rocket launcher , shot gun , sniper rifle. halo 3: assault rifle , battle rifle , beam rifle , brute shot , carbine , energy sword , flamethrower , fuel rod gun , gravity hammer , machine gun turret , magnum , mauler , missile pod , needler , plasma pistol , plasma rifle , plasma turret , rocket launcher , sentinel beam , shotgun , SMG , sniper rifle , spartan laser , spiker. halo reach: assault rifle , DMR , grenade launcher , magnum , rocket launcher , shotgun , sniper rifle , spartan laser , concussion rifle , fuel rod gun , focus rifle , needler , needle rifle , plasma launcher , plasma pistol , plasma repeater , plasma rifle , energy sword , gravity hammer , plasma cannon , machine gun.
I actually have no clue!
HUMAN: Assault Rifle. Magnum. DMR. Sniper Rifle. Rocket Launcher. Shotgun. Target Locator. Grenade Launcher. Spartan Laser. Detachable Machine Gun Turret. Frag Grenade. COVENANT: Energy Sword. Gravity Hammer. Plasma Pistol. Plasma Rifle. Plasma Launcher. Plasma Repeater. Fuel Rod Gun. Needler. Spike Rifle. Needle Rifle. Concussion Rifle. Focus Rifle. Detachable Plasma Turret. Plasma Grenade.
Defiantly the plasma rifle due to the sheer capacity of power and "rounds it holds", or the needler because it's shots explode once seven shots enter tissue.