Of a projectile, the speed, usually expressed in feet per second.
Measured at a specific point on the projectile’s trajectory. Such measurements must always include the range at which the reading was made.
Computed at the initial point of the trajectory, normally the muzzle of the firearm.
Any small hole, channel or tube designed to conduct the flash of the ignited priming powder from the breech to the propellant charge in the chamber.
A weapon designed to discharge flares for signalling purposes.