A type of smokeless propellant in the form of thin discs or cut squares.
Letter: F
FLASH HIDER
A muzzle attachment designed to reduce muzzle flash. Also called Flash Suppressor.
FLASH HOLE
1. A hole pierced or drilled through the web in the primer pocket in a centerfire cartridge case. 2. The hole in the end of a battery cup primer used in shotshells.
FLASH SUPPRESSANT
A material that is added to propellant for the purpose of reducing muzzle flash.
FLAT NOSE PROJECTILE
A projectile which is flat at its forward end.
FLAT TRAJECTORY
A relative term for minimal arching in the flight of a projectile. Generally, the faster the speed of the projectile, the flatter it’s trajectory.
FLAT-NOSED BULLET
A bullet with flattened front end perpendicular to the axis.
FLATTENED PRIMER
1. A condition where the normally rounded corners of a fired primer cup are squared due to internal pressures. 2. A primer cup configuration in which the crown is flattened to alter sensitivity.
FLINT LOCK
A muzzleloading firearm ignition system wherein a piece of flint is secured to the hammer in such a manner as to strike steel upon hammer release, causing sparks which ignite powder contained in the ignition system, for subsequent ignition of the main powder charge.
FLOATING CHAMBER
A system in which a rearwardly movable chamber operates the mechanism of a firearm when fired.