Depends on where you are, who the land belongs to, whether you have permission, are you in a safe area etc. We cannot answer without more information.
no
I hope so.
If you mean a legal resident alien, yes. If you mean a legal resident of Arizona, yes. If you mean a legal resident of another state- THAT depends on which gun. You may purchase a rifle or shotgun from a dealer in any state (unless you reside in CA) but you may only purchase a handgun in your home state.
A Desert Eagle .50 AE will fire them.
No. The Luger was a 9mm gun and the 50 Desert Eage is a 50 caliber gun. The 9mm round would fall out of the barrel, and if you did manager to get it to fire, you could damage the gun and/or hurt yourself.
The military training camps in the Sahara desert effects the environment by scaring off the animals by gun fire and shouting
Well, the answer is no, but Arizona does not have gun registration, so if you can carry a gun in Arizona, you can carry any gun you legally own or possess.
No, not as far as I know. As long as 10% of the gun is orange, yellow or colours that do not normally appear on real fire arms. (this law complies any where)
It depends on what you mean. You can fire a gun anywhere, however, it may or may not be legal depending you where you are and what the local gun laws are AND it may or not be safe, depending where you are. Check your local gun laws and be sure you can safely fire the gun without damaging any property or other people.
If you are speaking about Phoenix Arizona then the answer is yes they are legal to own. In fact one of the largest air gun dealers on the web is located in Glendale AZ.
Power is not determined by the make of the gun, but by the caliber of the cartridge that it fires. The Desert Eagle was made in several calibers. There are revolvers that fire less powerful cartridges, and revolvers that fire more powerful cartridges.
In the U.S. it is not illegal in any state that I know of, as long as you are in a location where it is otherwise legal to fire the gun.