Here is my quick DIY rear sight that I read from a japanese article. The reason why I did this mod is 2 fold:
1. To save money
2. I prefer the 2 rear dots to be closer to the notch. If you look at the SD rear sight, the holes are farther from the notch.
2 holes drilled on the rear sight
I used a lighter to make a mushroom on one end. I made each mushroom on each rod approximately the same size so it looks even. I mushroomed the other side once it was placed in the hole.
When its all done, this is how it looks..
I prefer the front sight to be brighter than the rear, as the rear one only helps as a guide only. The front sight helps me to acquire my target easily.
