Semi-Official List of Handheld Weapons

By this point, you know the drill. List weapons that would be handheld, as in held by a player/space marine.

The List
Of course, add new weapons and sections as you need.

Lasers:
Most lasers do low damage with high fire rate. They are also very accurate.

Missiles:
These are rockets. High explosive power, high damage, low fire rate.

Add more stuff please. I need ideas, I don't know guns.