I been fighting with the lock on my cva project hawken for 3yrs, thinking it was a stripped screw. I got some screws. while working on it I found that the sear spring was shot, the lock plate was needing a good polish, the tumbler was wrong, the sear was rubbing on the lock plate, the tumbler was wearing a groove in the lock plate.

just order a new l&r lock and be done with it.