Hi fellow Sako Fans, Took a friend hunting, He had no rifle so I let him use my Interarms MK X .243. The safety was hard to push off. I stripped it & found the safety adjustment is not working per book instructions. After adjusting according to the instructions it will fire on safe??It looks a lot like a #4 Sako trigger assy. I will not let the rifle out of the safe until I can get a prpoer operating trigger. I bought the rifle in the 1970s new, Hope I can find parts??