Check out Soldiers Knife Low-poly 3D model on CGTrader for $3. High-quality mesh by artifactsin3d: 18107 polys, 18018 vertices. PBR, Textured, UV Mapped.
STL (Stereolithography, filesize: 1.73 MB), OBJ (OBJ, filesize: 2.47 MB), FBX (Autodesk FBX, filesize: 1.1 MB), BLEND (Blender, filesize: 3.68 MB), GLTF (glTF, filesize: 61.4 MB)