$10 Pirate blunderbuss Low-poly 3D model by jart3d. Available on CGTrader with 9580 polys and 5002 vertices. Check it out on CGHub.
OBJ (OBJ, filesize: 1.16 MB), FBX (Autodesk FBX, filesize: 582 KB), TEXTURES (Textures, filesize: 8.98 MB), GLTF (glTF, filesize: 10.6 MB)