[MT2008]

I'm kinda of vague on what "action hero" means, but assuming that the role was based on a particular type of character, I would want to carry weapons appropriate for that character. If I were playing a federal agent, I'd carry a Glock or SIG as sidearm (since that's what most federal law enforcement agencies issue). If I were playing an SF soldier, I'd have an M4 or FN SCAR as my primary and a 1911 or SIG as my sidearm (since those are what most SF personnel carry).

Also, I don't like it when movies have protagonists who use weapons that are different (i.e. "superior") to those of their adversary or comrades. Directors do it because they seem to think it demonstrates that the hero is more individualistic and more badass than everyone else around him/her, but I think that difference for the sake of difference is just unnecessary and stupid. If you want an example, I think it's highly unrealistic that in "Heat", Vincent Hanna carries a custom ivory-gripped 1911 and an FNC, while everyone else in his squad carries the department-issue Berettas and either Mossbergs or M16s as long guns. And yes, I also know it's almost blasphemy to say anything negative about "Heat", and I also appreciate that Michael Mann uses his characters' choices of guns to illustrate their personalities.

Then again, maybe it's just because I relate more to everyman-type characters (the guys who are unlikely to emerge as heroes, but do so anyway). Part of my own personality, I guess.