I like this one with the kroot legs as well. He is holding a heat lance which you can tell is a sawed-off splinter cannon with a dental mixing tip on the end. Needs magnets.
I wanted to have bird men with faces like that in the codex. By removing the lower half of the head of the kroot, it made for a lot smaller head that fit with the size of the dark eldar. I also wanted to make the squad in various stages of augmentation. I thought I would have a few with kroot/birdman legs, a lot with bird heads, maybe some dark eldar heads with kroot spines coming out the back, or a helmet with spines breaking through the back. I also want to add some adrenaline injectors in the shoulders like in the fluff and drawings in the codex. I am also going to magnetize the gun variants to be able to swap them out as I see fit, or as they change the rules and make certain guns less effective.