Depending on your state, you could opt for open carry. It may or may not require a license, and it affords you the ability to carry the largest firearm that you can fire accuratly.
If you do decide to explore this option, visit opencarry.org and check things out (lots of good info for OCers).
This option, though, is not for everyone. I also expect there will be a few people to reply to this message stating that OC is a "bad idea" or that "it'll make you a target". I would encourage you to make up your own mind, instead of listening to those that have never done it.