Low Hardware Flipup Iron Sights

Hardware:
Kitchen rubber band, most will work, mine have a diameter of 35mm when laid out flat
M4*25 bolt and nut, one per sight
This is a set of iron sights that uses a tiny rubber band to work, the sights will snap into the lowered position and can be flipped back up by pressing the paddles on the sides.
refer to the picture for how to install the band