Picatinny folding iron sights

To assemble it you'll need 1 m3 by 20mm and 4 m3 by 30mm socket head screws, 1 self locking m3 nut and 2 normal or thin m3 nuts and 4 m4 by 6 set screws

To adjust X axis turn the screw on the rear post

To adjust Z axis position the yellow pice where you want it and tighten the screw holding it

To change aperture size just turn the pice