The Spartan Laser (also called the Spartan LAZ0R, the Super Gun, and the Amazing legendary Energy Blast Generator that will disintegrates those alien freaks to a fire) is an energy beam firing weapon commonly used by Master Chief when he needs to disintegrate stuff, and the Teletubbies on an occasional basis.
The Spartan Laser is manufactured by Spartan weapon makers. It is based around a battery in a metal shell. It is then encased in pure epicness. They then use their mail-rockets to deliver the weapons to whoever can afford them.