AK-47 Black Low-poly 3D model is available on CGTrader for $30. Original author: paulomeister. Specs: 7142 polys, 7810 verts.
MAX (Autodesk 3ds Max, filesize: 869 KB), OBJ (OBJ, filesize: 238 KB), FBX (Autodesk FBX, filesize: 498 KB), DAE (Collada, filesize: 438 KB)