A ban for assault weapons are needed now. Let everyone live with revolvers.

[Marrah_G]

23. From the Federal Assault Weapons Ban

Criteria of an assault weapon

Assault weapon (semi-automatic) refers primarily (but not exclusively) to firearms that possess the cosmetic features of an assault rifle (which are fully-automatic). Actually possessing the operational features, such as 'full-auto', is not required for classification as an assault weapon; merely the possession of cosmetic features is enough to warrant such classification as an assault weapon. Semi-automatic firearms, when fired, automatically extract the spent cartridge casing and load the next cartridge into the chamber, ready to fire again; they do not fire automatically like a machine gun; rather, only one round is fired with each trigger pull.

In the former U.S. law, the legal term assault weapon included certain specific semi-automatic firearm models by name (e.g., Colt AR-15, TEC-9, non-select-fire AK-47s produced by three manufacturers, and Uzis) and other semi-automatic firearms because they possess a minimum set of cosmetic features from the following list of features:
A semi-automatic Yugoslavian M70AB2 rifle.
An Intratec TEC-DC9 with 32-round magazine; a semi-automatic pistol formerly classified as an Assault Weapon under Federal Law.

Semi-automatic rifles able to accept detachable magazines and two or more of the following:

Folding or telescoping stock
Pistol grip
Bayonet mount
Flash suppressor, or threaded barrel designed to accommodate one
Grenade launcher (more precisely, a muzzle device that enables launching or firing rifle grenades, though this applies only to muzzle mounted grenade launchers and not those mounted externally).

Semi-automatic pistols with detachable magazines and two or more of the following:

Magazine that attaches outside the pistol grip
Threaded barrel to attach barrel extender, flash suppressor, handgrip, or suppressor
Barrel shroud that can be used as a hand-hold
Unloaded weight of 50 oz (1.4 kg) or more
A semi-automatic version of a fully automatic firearm.

Semi-automatic shotguns with two or more of the following:

Folding or telescoping stock
Pistol grip
Fixed capacity of more than 5 rounds
Detachable magazine.

http://en.wikipedia.org/wiki/Federal_Assault_Weapons_Ban

There is more information there in regards to high capacity magazines.