Check out Tactical Knife with Plastic Sheats Low-poly 3D model on CGTrader for $10. High-quality mesh by BurningUmbrella: 9676 polys. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 1.7 MB), OBJ (OBJ, filesize: 844 KB), FBX (Autodesk FBX, filesize: 353 KB), PNG (PNG, filesize: 80.2 MB)