These are the 3rd and 4th generation genestealer hybrids from Deathwatch: Overkill. They are armed with autoguns and have holstered pistols and carry mining explosives. Grenade launchers and modified mining lasers are their heavy weapons. 4th generation hybrids are the most human, but with prominent foreheads. 3rd generation have a more xenos visage, and may have claws or extra arms.
I went for a very traditional blue/ grey/ lilac/ purple scheme, which I find satisfyingly nostalgic. Here's the more humanoid end of the cult:
Next week: 1st and 2nd generation hybrids!