[QUOTE=remtom1200;6682 I am curious how the rear screw would fit through the trigger assembly, tube, cap, breech and cap?[/QUOTE]

It barely does.

If you tighten the breach screw all the way...you will NEVER get the rear trigger---->tube---> cap screw in there.

You have to keep whatever screw you put in first loose, then line it all up with a bit of pressure...get second screw to start to thread....then tighten them both.