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Dec 16 (Reuters) – Connecticut shooter Adam Lanza used a

weapon in the Bushmaster AR-15 family to shoot all of his

victims at a school in a rampage that killed 20 young children

and six staff members on Friday in Newtown, Connecticut, police

said. He then used a handgun to kill himself.

Some facts about Bushmaster AR-15 assault weapons:

* An automatic version of the weapon is used by U.S.

soldiers in Afghanistan and some police forces in the United

States. The M-16 is the rifle version of the military weapon,

and the M-4 is the carbine, a weapon with a shorter barrel.

* A similar civilian model was used in 2002 by the

Washington-area snipers John Allen Muhammad and John Lee Malvo,

who shot randomly at victims during a three-week spree that

killed 10 people.

* The weapon is highly modular, meaning a user can change

the barrel, the stock, the magazine and other features, easily

changing a weapon’s characteristics such as weight, capacity,

range and accuracy.

* The AR in “AR-15” rifle stands for ArmaLite, the company

that developed it in the 1950s, and not for “assault rifle” or

“automatic rifle, according to the National Shooting Sports

Foundation.

* Capacity: 30 rounds in a standard military magazine.

* Suggested retail price of the Bushmaster .223 caliber M4

carbine: $1,197 to $1,391.

* National retailers selling assault weapons include:

Wal-Mart Stores Inc, where it is for sale in a small

percentage of stores; Dick’s Sporting Goods Inc, and

Cabela’s Inc.

* Civilian uses: A semi-automatic version of the weapon is

popular in competitions and firing ranges. Can also be used for

hunting.

* Connecticut law: The state requires rifles and shotguns to

be registered but requires no permit to purchase them, according

to the National Rifle Association’s Institute of Legislative

Action.

OTHER FACETS

Automatic vs semi-automatic:

Automatic means all multiple rounds can be discharged by

keeping a finger on the trigger. Semi-automatic means one bullet

per trigger pull.

Carbine vs rifle:

A carbine is a shorter-barreled rifle, making it lighter and

easier to handle in tight spaces. That also makes a carbine less

accurate for long-range shooting. Both have a grooved barrel

that affects the spin that makes it more precise.

Legality:

When the Federal Assault Weapons Ban expired in 2004,

Bushmaster resumed offering previously illegal features on

products for the consumer market such as interchangeable flash

suppressors, bayonet lugs, collapsing telescopic stocks and

high-capacity magazines.

The Bushmaster company:

Founded in 1973, bought by private equity group Cerberus

Capital Management in April 2006. Now part of Cerberus’ Freedom

Group, which also owns Remington.

Bushmaster firearms are used by the military of more than 50

countries, according to its website.

Bushmaster products are typically less expensive than those

of Remington and Colt. Bushmaster is the market leaderhas the

biggest market share

Headquarters: Madison, North Carolina.

Manufacturing facility: Ilion, New York.