For this project I wanted to try a different workflow. I took advantage of it to learn new programs.
I created the whole weapon inside fusion 360, retopologized in max and textured in substance.
So this is my first try in Fusion360 and i'm pretty satisfied about the result.
Body Tris: 29138 Verts: 19926 Map: 2k
Sight Tris: 3284 Verts: 2648 Maps: 1k
Laser/Light Tris: 2808 Verts: 2032 Maps: 1k