well, all those images are just models drawn by somebody else. not in-game textures.
i do think a reload/shell reject mechanism should be there mirrored, as it is a two-barrel. looks logical.
the little black grid thing (the one with two screws, right after the shell reject thing), whatever it is, isn't on that image, so let it not be there. only on one side.
i also notice that some screws aren't screws but hexagonal holes.
i wouldn't be unhappy if they are all (-) screws, but if it's not difficult to model AND print, maybe they should be changed.
i count 3 of them on one side - one above the magazine and two on a pumping detail.
there's also 1 screw missing on your model, behind the pumping detail, but a) maybe you'll add it later and b) if it isn't there, i won't be unhappy... though for the case of accuracy...
well i marked all points in question with red, and the "grid" part that shouldn't be on another side - with green.
can't wait to get this item. that one will be a truly unique accessory. as i said in PMs, a soldier based on a phicen M34 body really needs massive weapons
i tried regular shotguns, but they just look like pistols in his hands. this one will be massive and perfect.
thank you infinite times for doing it.