Check out M16 A2 3D model on CGTrader for $34. High-quality mesh by Carlosan: 16954 polys, 16238 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 2.17 MB), FBX (Autodesk FBX, filesize: 1010 KB), USD (USD, filesize: 1.52 MB), OTHER (Other, filesize: 1.52 MB), PNG (PNG, filesize: 131 MB)