RWIsrael said:
I find the whole CCL thing facinating, would you mind elaborating on that?
Are you not allowed to just carry however you wish, open or concealed?
The Israeli laws I worked under state that you need to get a license for each firearm and have a valid reason to have it (the govt has decided on a list of reasons it deems valid, most civilians will not qualify and those who do will typically have only one firearm) but once you do get your gun nobody cares how you carry - open or concealed, round in chamber or not. You might get weird looks if you open carry but that's about it.
In the USA most firearm regulations are handled at a state and sometimes even county/city level, so the laws for firearm registration and carrying restrictions can differ state to state and sometimes even city to city. It can be confusing if you travel the country often and carry firearm(s) and its up to you to know the laws in each state you will be traveling in.
For the most part: You do not need to register a firearm (though there are a couple states/territories that require registration of all forearms or handguns only), and as long as you are 18+ you may purchase and carry a long gun (shotgun/rifle) from any licensed dealer and as long as you are 21+ you may purchase and carry a handgun from any licensed dealer.
Most states allow you to open carry without any kind of permit, though probably about 25% of states have restrictions on open carry (either you need a license, or you are restricted to open carry in public and conceal carry is the only permissible way to carry).
Most states require you to have a concealed carry license if you want to carry concealed. the only states that have NO restrictions on carrying a firearm are: Alaska, Arizona, Arkansas, Idaho (residents only), Kansas, Maine, Mississippi, Missouri, New Hampshire, North Dakota (residents only; concealed carry only), Vermont, West Virginia, and Wyoming (residents only).
Also, to make things a little more complicated, of the states that require CCL, some are "shall-issue" states meaning that they will give you the license so long as you meet the standard criteria, and some are "may-issue" which means local authorities can use their discretion on whether or not they will issue to you.
Not all states honor CCL's from other states, so some states require you to get a CCL from that specific state if you want to carry concealed there even if you don't live there.