3d art assets development

here is my development on my 2 assets for 3Ds max i am making a gun case and a barrel.  to make the gun case to have edges like that i started of by extruding the edges then chamfering them so it gives the edge that sc-ifi look and to get the middle crease i extruded a tiny line so it looks like it opens. to get the handle i cut a tube in half bridge the gap then attached it to the box.