Steyr LG110 Hunter Disassembly

Hi Guys
I have a small problem, I can't find any videos or directions on the internet, to disassemble my rifle. The reason why I want to take it apart is that I need to get to the hammer spring screw, to adjust the velocity of my rifle. 

Please let me know where I might find this info, or you might have experience with this rifle, please let me know

Thank you very much

Biagio