Genestealer Aberrants

Genestealers too, can enact the term 'Hammer Time'.

A Genestealer Aberrant is a type of Hybrid utilized by a Genestealer Cult. They are hideous freaks of nature even by the standards of the Cult, why they are exactly born into the brood remains unclear. Though dim-witted, their instinctive need to defend their brood makes them valuable assets to the cult. They are massively muscled creatures capable of wielding heavy weaponry with ease. This makes the Aberrants as the 'Heavy Support' of the Genestealer Cults, usually carrying heavy mining or industrial equipment, such as giant power hammers, wrenches, or drills to rip apart heavy armor. Aberrants are viewed as essential when a Cult decides to stage an uprising on a Imperial Planet.

Not even the Magus himself knows what manner of strange processes gives rise to an Aberrant. Some quirk of ancestry ordains their fate as the gene-cycle is somehow perverted. Perhaps the initial implantation of the ovipositor was interrupted or spoiled, perhaps the interbreeding happened during a Warp tumult, or perhaps the forbidden dabbling of curious bio-scryers gave rise to monsters that killed their creators upon birth. Whatever the circumstance that leads to their inception, these Aberrants soon seek out the lowest of the cult’s dungeon-like lairs, finding a Magus or Primus who gives them purpose. From that point on, they are used as pure muscle for the cult’s purposes.

However due to a strange psychic resonance from the Genestealer Patriarch, cult members are fiercely protective and nurturing of these abominations. Thus rather than disposing of them, cultists will often find roles of Aberrants in their plans. They are perhaps the most dangerous element the Cult has, for they are obviously non-human, and should they be discovered the entire brood risks annihilation by Imperial authorities.

Oddly, although they appear in the Genestealer codex, you can only buy the models in the Deathwatch: Overkill box game.