This model i have created during 2-3 month so i did this work so careful, this model is handmade gun. There are not any overlapping UV islands or vertex.
........Model_formats........
3DS++FBX++DAE++STL++OBJ++
......Textures......-color++-diffuse++-normal_map++-ior++-Glossiness++ -opacity++-Metallic ++-Roughness++-Reflection++-opacity++Low_poly++UVW_Unwrap++Marmoset_tollbag_file++
STL (Stereolithography, filesize: 1010 KB), OBJ (OBJ, filesize: 1.58 MB), MAX (Autodesk 3ds Max, filesize: 2.63 MB), 3DS (3D Studio, filesize: 866 KB), DAE (Collada, filesize: 3.29 MB), FBX (Autodesk FBX, filesize: 633 KB), TBSCENE (Marmoset Toolbag, filesize: 5.62 MB)