The m84 stun grenade game ready asset with scene setting on marmoset toolbag and unity asset packagetexture are in 4K
source file for study in substance painter include you could export it 8k
FBX (Autodesk FBX, filesize: 42.8 MB), SPP (Substance Painter, filesize: 166 MB), OTHER (Other, filesize: 208 MB), TBSCENE (Marmoset Toolbag, filesize: 85.2 MB), TEXTURES (Textures, filesize: 42.6 MB), UNITYPACKAGE (Unity 3D, filesize: 84.2 MB), GLTF (glTF, filesize: 54.4 MB)