Picatinny rail flip-up iron sights

Hardware required:
M4x25 screw and nut (for each part of the iron sights)
Rubber band
1mm thick wire (for attaching the bubberband to the iron sights and the iron sights to the "base", see images)

The images should show clearly how to assemble it

You need to remove the screw entirely in order to slide the sights off the rail, not just loosen it