Check out SA80-Launcher-Scope assault rifle in computer screen Low-poly 3D model on CGTrader for $50. High-quality mesh by olmstead007: 2257 polys, 1631 vertices. Textured, UV Mapped.
MAX (Autodesk 3ds Max, filesize: 392 KB), OBJ (OBJ, filesize: 34 KB), FBX (Autodesk FBX, filesize: 45.7 KB), STL (Stereolithography, filesize: 23.8 KB), 3DS (3D Studio, filesize: 40.2 KB)