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How BB Guns Work
by Bebe Pistle
http://www.bbgunn.com

All firearms, from pistols to cannons, use the same basic
principles. An explosion is created behind the projectile
in the cylinder. This causes energy to expand. When
energy expands, it needs to find a way out. Whatever
projectile is in the way will get pushed out by the
explosion and will shoot out the end of the barrel.

The principle behind BB guns is pretty much the same as in
firearms, except there is no explosion. The expanding matter
is ordinary air, carbon dioxide or some other gas. Before
you fire the gun, the gas is compressed so that it has a
greater density, and consequently a greater pressure than
the air in the atmosphere outside the gun. The compressed
gas is stored in an airtight container until you pull the
trigger. This opens up the gas container so the gas can flow
out into the barrel, just behind the BB. Since it is more
compressed, the gas behind the BB pushes out with greater
force than the air in the atmosphere pushes in, and the BB
is propelled forward at great speed. This is the idea behind
all gas-powered guns, including high-powered air rifles and
paintball markers.

The container is stored on the gun and when the trigger is
pulled, the hammer strikes the container releasing the
compressed air. Since the pressure for the compressed air
on the inside of the gun is greater than the air on the
outside, the air travels down the length of the barrel and
pushes the BB out at a very fast speed.

Air-gun designs differ mainly due to the compressed air.
Some use a pumping action to build up pressure and some use
pre-compressed air which is stored in cylinders. These
cylinders fit on the gun and release short bursts of air to
propel the BB. Before each shot, most BB guns have to be
cocked. A BB gun most likely cannot accidentally fire
without being cocked first. This makes them safer than
other guns. But no gun, bb or otherwise, should be left
where young children can get to them.

It is suggested that trigger locks be placed on BB guns to
prevent someone from accidentally pulling the trigger. All
guns should be stored unloaded and in a gun case when it's
not being used.

With so many bb's to load and unload, who wants to mess
with that? Well, you do. You should always unload your gun
before storage. Removing the bb's reduces the risk of
someone accidentally shooting another person or animal.
Also, never point the gun at anything but the ground until
you are ready to shoot it. Being care and observing all
the safety precautions will help prevent you from hurting
yourself or someone else.

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