Check out Very Low-Poly Pistol Free low-poly 3D model on CGTrader for free. High-quality mesh by Laihus: 52 polys, 84 vertices.
STL (Stereolithography, filesize: 61.8 KB), OBJ (OBJ, filesize: 64.7 KB), GLTF (glTF, filesize: 16.7 KB), FBX (Autodesk FBX, filesize: 52.7 KB)