Possibly the Calico Light Weapons system. It includes a pistol with a 100 round magazine.
Talk to the police.
Resources to do that are available only to law enforcement.
A small number was shipped to Canada, though they were only really used as a last resort weapon and personal defence weapon.
The AK-47.
The largest KNOWN nuclear weapon was made by the Soviet Union (Russia) and was called the "Tsar Bomba" (King of Bombs). It had a yield of ~50MT.
The U.S.A.
Usually, it means the weapon is not available for easy acess.
In Battlefield 3, the player unlocks the UMP -45 Personal Defense Weapon at level 16. In real life, this weapon is classified as a submachine gun, in the game it falls under the Personal Defense Weapons category which include submachine guns and is available to all classes.
The major revenue of US comes from their weapon business. They are the largest weapon seller in the world.
A non-service pattern weapon (NSP) is a personal weapon that members of the military may have. NSPs are limited to one.
The largest and heaviest Fencing weapon is the Epee
There is no best weapon in Call of Duty, it's all about your personal preference, if you like a weapon use it. If you don't like it, don't use it:)