In 9th Edition these heavy weapons have been my go to load out for tactical traitor marine units.
I decided that I would make up another model from the bits box
Reaper chain cannon came from Zinge Industries.
Shoulder pad and backpack were 3D prints from a seller who was on eBay for a while but isn’t anymore.
Might do some more like this at some point in future, but the idea is just to have some more options to mix and match in with other troops.