Oh yes, I have flown several times with my hi-capacity, fully semi-automatic, evil-looking, militarized assault rifle death dispensers. [facepalm]
It's been about a year since I've flown with a firearm, so I don't know if anything has changed, but most airlines have similar rules. Just be careful about things like the case size and how you store your ammo, because they might try to bite you in the butt for it.

