Parts of a Gun
An artillery piece consists of a Barrel (tube) with two openings.
The opening were the shell comes out is the muzzle, The breech is the
opening where the ammunition is inserted. The weapon size is given in terms
of its caliber. (Diameter of the bore or ammunition)
Guns may have either a rifled or a smooth bore. Rifled bore have spiraled
grooves that spin and steady the shell, so it will travel nose first to the target.
Smooth bore guns use ammunition with fins that steady the shell in flight.
The primer or fuse ignites the propellant in the ammunition. The propellant
develops a very high pressure that forces the projetile out of the muzzle at
hight vilocity (speed).
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