So continuing with the Alpha Legion theme, they are experts at intervention and underhanded tactics.
Sometimes direct pinpoint action is required, so there is a need for snipers.
Now there is no "sniper" option on any army list that covers Alpha Legion, however there is no kill better than overkill, so I chose the longest range weapon available on my lists - the Las Cannon.
Again I used the normal Space Marine kits - this time the heavy weapons one and the kneeling legs.
Now for "Line" marines I have used a combination of Chaos and normal marine parts avoiding anything too chaotic. Now the sniper is going to be an Elite choice so I used just normal marine parts.