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The barrel of a firearm is the tube, usually metal, through which a controlled explosion is released in order to propel a projectile out of the end at great speed.

The first guns were made in a time where metallurgy was not quite what it is today, so the pipe needed to be braced periodically along its length, producing an appearance somewhat reminiscent of a barrel.

1 Smallbore

Generally a smallbore gun refers to a rifle or a handgun that has an inside barrel diameter of less than .243(6mm) caliber.

2 See also

Firearm components

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Topics: Barrel (firearms), Barrel Racing, Barrel Shifter, Barrel Of Oil...

BarrelBarrel can refer to: Barrels for storage. Barrels for aging alcoholic beverages. Barrel as one of several units of fluid measure (for crude oil and beer). Barrel as a firearms component. Barrel as a watch component.	Barrel racingBarrel racing is a rodeo event that features a horse or barrel racer and one mounted cowgirl, also called a barrel racer, running a cloverleaf pattern around three barrels in a triangular arrangement. The cowgirl will take up a gallop and ride towards the	Barrel shifterA barrel shifter is a hardware device that can shift or rotate a data word by any number of bits in a single operation. It is implemented like a multiplexor, each output can be connected to any input depending on the shift distance. References Digital ele
Barrel of oil equivalentThe barrel of oil equivalent (bboe, sometimes BOE) is a unit of energy approximately equal to 5. 8×109 BTU or 6. 12×109 J, based on the approximate energy released by burning one barrel of crude oil. Multiples of the bboe include the kbboe (or kBOE), one	Barrel (unit)The barrel is the name of several units. A barrel of crude oil or other petroleum product (abbreviated bbl) is 42 US gallons, approximately 159 litres or 35 Imperial gallons. The size originates from the use of 190 litre wine barrels in the early Pennsylv	Barrel vaultIn architecture, the barrel vault is a vault which is similar to a tunnel. Several arches side by side form a barrel vault. Barrel vaults were used extensively in Roman architecture. They were also used to replace the Cloaca Maxima with a system of underg
Barrel (firearms)	Barrel (storage)	Barrel (horology)
Barrel organ	Barrel cactus

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