Check out T91 Assault Rifle 3D model With PBR Texture Low-poly 3D model on CGTrader for $10. High-quality mesh by maya4511: 7771 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 1.86 MB), TEXTURES (Textures, filesize: 9.32 MB), MA (Autodesk Maya, filesize: 2.03 MB), FBX (Autodesk FBX, filesize: 564 KB)