Check out Flintlock Grenade Launcher 01 Black Low-poly 3D model on CGTrader for $11. High-quality mesh by don-falcone: 4846 polys, 2878 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 373 KB), FBX (Autodesk FBX, filesize: 693 KB), TEXTURES (Textures, filesize: 568 MB)