The file 'Epic Chaos Space Marine 3D Printer Model' is (stl) file type, size is 133.5KB.
A space marine with the backpack modified to look like the one CSM use. I haven't tried this one yet, so I have no idea how it'll come out, but it's not too different from fractalnoise's design.
chaos_space_marine_4_backpack_variant_2.stl | 343.9KB |