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Arizona is one of several open and carry gun laws.

Here's some facts for you:
http://www.legalmatch.com/law-librar...-gun-laws.html

Arizona has some of the loosest weapon restriction laws in the nation. Many things that are allowed in this state would get you arrested anywhere else. Because the penalties for weapons possession can be extremely severe, and differ drastically from state to state, keep in mind that the following rules apply only to the state of Arizona.
Open Carry Rule


Arizona is an "open carry" state, which means that anyone can legally carry any (legal) weapon in the open, without any permits, as long as the weapon is:

• Kept in a holster or scabbard
• At least partially visible on your person, or;
• Kept in a container or the glove compartment of a vehicle (still must be holstered, however)

This means that it is perfectly legal to carry a loaded handgun or revolver on a belt holster, out in the open, while you walk down the street, and no special permits are required. You CANNOT, however, unholster that weapon without a very good reason, nor can you walk around holding a gun in your hand or tucked into your pants. You must have a bona fide holster or case to keep it in, and both the gun AND holster must be openly visible.

However, the cases do not have to be locked, unlike most states, nor even capable of locking.

Laws for concealed weapons are really neat ... you don't even have to be a resident to get a conceled weapons permit which is good in up to 25 other states:

Concealed Carry Permits

Known as "CCW's," concealed carry permits allow anyone to carry a weapon on their person out of sight. They are available to anyone who meets the state of Arizona's (rather lax) criteria:

• Be at least 21 years of age
• Have no felony convictions
• Be in the country legally
• Pass an Department of Public Safety approved firearm safety course (can be done in most community colleges)

It is important to note that Arizona does not distinguish between resident and non-resident, or indeed even between U.S. citizen and permanent resident. The only requirement is that you are NOT an illegal alien; any other person is eligible for a concealed carry permit. Also, the safety course, (8 hours long with a 2 hour renewal course every 5 years) MUST be taken within Arizona, regardless of whether you are a resident or not.

Pocket knives may be carried out of sight without a permit but the Attorney General's opinion is that this only includes pocket knives with blades that do not exceed four inches in length. Arizona statutes do not address the issue of switchblades but it is likely that the concealed carrying of any switchblade with a blade longer than four inches would also require a concealed weapon permit.

Will My Permit Be Recognized Anywhere Else?

Over 25 other states recognize Arizona's CCW permit, meaning you can carry a weapon concealed within those states as well, as long as you are there only temporarily.