Lasers fire beams that reaches instant across the arena and lasts between 0.5 and 1.0 second - having the effect that only a "full" beam contact delivers full damage. It fires every 2.5 seconds. Beacuse of it's low reload, it causes many damage, as the damage shown on the info of your laser will do three times the damage.
Laser is unlocked upon reaching Stage 5 prestige 0. It the first part you can unlock. The ultimate version of this is the Christmas laser.
It is not strategic if your opponent is stronger than you because the Laser has a mediocre charge before firing the laser, giving the opponent the higher success rate. Use fast fire weapons instead, like rocket or minigun. You use a sneaky with backpedals or boosters (depending on the position of gadgets slots) and equip a laser on it. It will have to one shot the enemy, or else there will be a chance you won't be able to fire at the enemy again. Lasers are ideal for bodies with tons of health.