I recently replaced the standard sights on my Yugo SKS with the Mojo apperture sights. If you have not seen these, you have to take a look:
http://www.mojosights.com/ak47_sks.html
It improves the sight picture 100%. They are also very rugged. I also installed the Wolf reduced power trigger spring kit for the SKS. It reduced the weight of the trigger pull about 50%. The SKS has a horrible trigger. However, this made it tolerable.
The sights and the spring kit took 15 minutes to install.
http://www.mojosights.com/ak47_sks.html
It improves the sight picture 100%. They are also very rugged. I also installed the Wolf reduced power trigger spring kit for the SKS. It reduced the weight of the trigger pull about 50%. The SKS has a horrible trigger. However, this made it tolerable.
The sights and the spring kit took 15 minutes to install.