Salamander Scouts

New recruits spend time in scout squads while they train and undergo changes to their bodies
from the chapter geneseed.  Few units actually show bare heads, the effects of the Salamander homeworld's radiation can be seen by pitch black skin and red eyes.

Here is a unit of scout snipers outfitted with sniper rifles and camouflage cloaks -

example of the cloak

true homeworld recruits

Search and destroy!