This is the Combat Shotgun fro the game Doom Eternal with the standard barrel and without the mods.

In time I will get the mods completed as well as I've designed the mods to be interchangeable with the base/butt stock as they are in the game.The model as you can see in the photos is separated into many individual parts to assist in 3D printing and also makes for less support material to be used.

The pump action is designed to move like the real deal and the parts may require some sanding to fit depending on if they are printed with SLA or FDM type printers as they are designed to be a very close fit.

It isn't required but I highly recommend printing the slide section (pipe) of the pump action in the final colour you want it to be as it will cut down on having to paint it.