A low-poly 3D model of a Stylized Drum Crossbow doesn't contain any n-gons and has optimal topology. The archive with textures contains two folders:

Crossbow Textures (2K) - base color map, metalness map, normal map (OpenGL), roughness map. Bolt Textures Textures (512x512px) - base color map, metalness map, normal map (OpenGL), and roughness map. Additional information.

Files and Formats: OBJ, FBX, ZTL, MA, MB, Folders with textures

Geometry - Polygon mesh

Unwrapped UVs - Mixed

Images were rendered in Marmoset.