Fun Thread!
Since we are angling for "action hero" and not "super hero" (a super hero probably would not have a weight limit requirement), I would go with just a slight variation on what I already carry......a long-slide BHP with just a touch of engraving to class it up (they do exist, just have not seen one made in a long time). I am assuming I would be more of the "private citizen" action hero like a cop/private detective/****** off vigilante instead of an official "armed forces" action hero where engraving/"pretty weapons" were discouraged.
J