Check out Flintlock Rifle 01 Classic Low-poly 3D model on CGTrader for $11. High-quality mesh by don-falcone: 5041 polys, 2707 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 420 KB), FBX (Autodesk FBX, filesize: 758 KB), TEXTURES (Textures, filesize: 402 MB)