Check out Sci-Fi Combat Drones Pack Low-poly 3D model on CGTrader for $24.99. High-quality mesh by satproductions. PBR.
STL (Stereolithography, filesize: 1.27 MB), OBJ (OBJ, filesize: 1.24 MB), UNITYPACKAGE (Unity 3D, filesize: 105 MB), PNG (PNG, filesize: 102 MB), FBX (Autodesk FBX, filesize: 2.13 MB)