Daryl , it is as I thought , the extensions at the back of the strikers are broken . The one nearest the turn screw is about the right length but would have had a stud on it facing out ward from the lock that engaged in the inside face of the hammer . This pulled the striker back when the hammer was cocked . The grove was cut in such a way that it did not rely on the connection to drive the striker fully forward on firing and it is the hammer that actually hits the striker at the point of detonation. I think that due to wear or not perfect fitting caused the hammer to put excess pressure on the connecting piece that caused it to break ,possibly combined with metal fatigue on a very small area of stress .
Hope that makes sense to you .As you can no doubt see that they would be a pain to make and get right is almost certainly why thy have not been replaced
Last edited by gunman; 03/08/15 09:42 AM.