Check out RG-6 grenade launcher dwarf Low-poly 3D model on CGTrader for $10. High-quality mesh by ivan-melnickov2010: 25804 polys, 13768 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 583 KB), BLEND (Blender, filesize: 220 MB), FBX (Autodesk FBX, filesize: 1.1 MB), TEXTURES (Textures, filesize: 276 MB)