1. The action loads, fires and ejects ammunition.
2. The barrel is a metal tube that the projectile passes through.
3. A butt is the end of the stock that is held against the shoulder. Sometimes fitted     with a recoil pad.
4. The stock supports the action and in many cases, the barrel.
5. The trigger guard is a protective ring that deters the trigger from being     accidentally struck or touched.
6. The muzzle is the front end of the barrel where fired projectiles exit.
7. The trigger is the part moved by the finger that fires the cartridge or shot-shell.
8. The magazine is a compartment that holds ammunition for the action to load     into the chamber. This can be built into the stock or a detachable container.
9. The breech is the rear end of the barrel, beginning with the chamber.
   10. The safety is a mechanical device designed to prevent accidental firing (never     to be used as an alternative to safe firearm handling).
   11. The bore is the interior channel of the barrel through which fired projectiles     travel.
   12. The bore is the interior of the barrel of a gun or firearm.
   13. Sights can be a simple set or system of markers that have to be aligned together     with the target (such as iron sights on firearms), or optical devices that allow     the user to see a sometimes optically enhanced.
   14. The hammer is a part of a firearm that is used to strike the percussion     cap/primer, or a separate firing pin, to ignite the propellant and fire the     projectile.
   15. The casing is a type of pre-assembled firearm ammunition packaging a     projectile (bullet, shots, or slug), a propellant substance (usually either     smokeless powder or black powder), and an ignition device (primer).
   16. A pistol is a type of handgun.
   17. The primer is the chemical and/or device responsible for initiating the     propellant combustion that will push the projectiles out of the gun barrel.
   18. The chamber is the portion of the barrel or firing cylinder in which the cartridge     is inserted before being fired.
   19. A rifle is a portable long-barreled firearm designed for precision shooting, to be     held with both hands and braced against the shoulder for stability during firing.
   20. Powder is typically smokeless or black powder.
   21. The rifling is the arrangement of spiral grooves on the inside of a rifle barrel.
   22. The forestock is the part of the stock meant to be held by the fore-hand.
   23. A shotgun is a firearm that is usually designed to be fired from the     shoulder,which uses the energy of a fixed shell to fire a number of small     spherical pellets.
   24. The projectile may also be referred to as the bullet and is the part of the     cartridge that leaves the barrel and is meant to strike a target.
   25. The cartridge is a unit of ammunition, made up of a case, primer, powder, and     bullet. Also called a "round", or “load”.