The MP-203-24, short recoil action magazine-fed automatic shotgun.
A high-capacity magazine-fed shotgun concept for times when something in particular direction must be totally destroyed.
Could be well used in SCP universe.
The model features the interchangeable rails and both fired and unfired shells.
About 23K tris, 4K maps
The marmoset viewer can be found here - https://www.artstation.com/artwork/q6Jen.