I am planning on running a ton of Cyclic Ion Burst Cannons (CIB) with 8th, so had to find some options. I placed an order with a 3D printer (not sure if I am allowed to share the info, but will if it is ok). Here is what i received
My loadout for my commanders will be 3 CIB and ATS. Having one on each arm looks pretty cool, but a third on the shoulder mount i don't like the look of. I played with using the joining bit to put two on one arm and a third on the other and didn't like the unbalanced look either. So i decided to get crafty and cutting with my knife to create a Tri-Barrelled CIB:
these are just held together with BlueTack right now. I may play with bulking up the outside a bit.