Iron Sight for softair weaver picatinny rail

Sometimes I play plinking with airsoft rifles, so I decided to try to project a couple of simple but efficient sights to mount on usual weaver rails.
I made 2 model of rear sights which differ slightly only aesthetically.
Rear sight correct the shoot on windage, forward sight correct elevation.
I prepared an M5 thumb nut, it's threaded but I warmly recommend to "refresh" thread with an M5 male for threading.
I also prepared (as you can see on pictures) rear and front sight with or without ho