I have the trigger group housing fitted in place and the retaining screw installed.

With that step complete, all of the internal machining has been done. Now I can start the exterior machinging. I use the 4th axis on the mill so I can rotate the action as needed. This is a tense process as a slip up is not repairable at this point. All of the external surfaces are machined leaving .005" over the finished dimension as designed. This allows me to finish the action without worrying about undercutting parts. .005" is actually a lot of material to remove with polishing stones and paper.

Here is the setup....

I figured a short video clip would be better than a picture at this point.