Judging by the number of hits on my previous Gun Kata Space Marine article, the meme is a popular one. So today, I wanted to explore it in a bit more detail with some more regular parts.
One weapon that every "standard" space marine comes with is the bolt gun / bolter. There are a number of ways to build in some dynamism in to such weapons to make any space marine stand out on the tabletop from its counterparts and "regular" space marine armies that just have bolters held across the body in a regular fashion.
In the image below, I'm going to illustrate this with both a bolter and a bolt pistol. Firstly, the bolt pistol. This comes from the chaos space marine range. And the only thing that I've done to it is a wrist rotation. Seriously: that's all. But: it is more than sufficient to give any marine holding it a unique "gangland" kind of vibe as the pistol is now held horizontally such that the empty spent rounds are ejected directly downward (rather than sideways as is usually the case). I pinned the wrist rotation in place to give it extra support, but I don't think its really needed.
The bolter is a more complicated matter. Firstly, Space Marines are supposed to be ambidextrous. But every model always has the space marine holding the bolter's trigger in the right hand. Both space marines and chaos space marines suffer from this. I think the reason is because the spent bolt rounds supposedly eject from that side of the bolter and hence no one wants to be whacked in the tummy by them ejecting in the middle of a gun fight. But this situation is different if a space marine is wielding the bolter one-handedly. And why wouldn't they - they are super human angels of death after all!
Hence for the bolter, I've used a chaos space marine arm (one that connects to a heavy bolter, or a standard bearer arm will suffice) and attached this to a hand taken from the grey knights range (they have a couple of clenched left fists on the sprues) incorporating another wrist rotation when I attached it. Then, a standard bolter (drilled, of course!) is attached on the top of the fist to finish the conversion. The result: a left handed held bolt gun angled horizontal to the ground that makes a matching pair with the bolt pistol. I'll be adding both of these arms to the same space marine to create a unique gun kata style marine that is holding both arms out to his front, stretched out, and firing away at his enemies.