Kevlar

The infected spacecman steals your perks if he gets you, then you can buy new ones. The achievement says purchase all perks not have them at once

If he had a ray gun i seriously doubt the game would drop another one for him, its like hitting the box,how many times have you gotten 2 rayguns out of the box at the same time

The guy in the zombie labs vid is wearing american digital camo, just sayin