Belt Fed Shotgun PBR Low-poly 3D model is available on CGTrader for $35. Original author: furqaan. Specs: 22900 polys, 11500 verts.
OBJ (OBJ, filesize: 1.96 MB), FBX (Autodesk FBX, filesize: 690 KB), MAX (Autodesk 3ds Max, filesize: 6.03 MB), 3DS (3D Studio, filesize: 969 KB), TBSCENE (Marmoset Toolbag, filesize: 33 MB), TEXTURES (Textures, filesize: 797 MB)