R.Marshall,
If it is a transition action, it may or may not have the little spring loaded bolt shroud lock on the left side of the bolt shroud nor the projections on the firing pin that prevents firing if the bolt is not closed. If this is the case, the bolt shroud may just be partially turned. Can you post a photo of the shroud? I don't understand what the last photo is of.
Mike

Last edited by Der Ami; 07/22/19 05:14 PM.