Check out 3DRT - Sci-Fi Forces - AA Gun 2 Low-poly 3D model on CGTrader for $4.96. High-quality mesh by 3DRTcom: 900 polys. Textured, UV Mapped.
OBJ (OBJ, filesize: 525 KB), MAX (Autodesk 3ds Max, filesize: 263 KB), DAE (Collada, filesize: 263 KB), FBX (Autodesk FBX, filesize: 263 KB), MA (Autodesk Maya, filesize: 263 KB), 3DS (3D Studio, filesize: 263 KB), MS3D (MilkShape 3D , filesize: 263 KB)