I recently aquired and Feinwerkbau 150 match rifle. Externally it is in excellent cosmetic condition. However, when the gun is cocked, the cocking lever stays to the rear and will not return home. I was able to depress the safety plunger inside of the cocking lever with the gun in a vice and gently return it to battery. I have been away from 10 metre shooting for a long time and am thinking about returning to it if I can get this rifle working. Does someone out there have an idea where a shop manuel can be found? Thanks so much,.....Ray