Luckily for me, I'm in an island nation in the middle of nowhere.
The chances of a decent outbreak are slim here.
Just shut down the borders and watch the world go to hell in a handbasket.
EDIT: I have addendum rights. Watch this space for a glossary and information on combat terms.
Really Incomplete. Gonna add a ******** later when I have the time. Tell me if I miss something.
Anyway, lets kick it off like a dead leper's head.
Basic Terms:
Cartridge: The whole round.
Bullet: Refers to the projectile it fires.
Casing: The container that holds the powder and bullet which must be ejected from the firearm after firing.
Shell: Can be used to refer to the casing or the projectile it fires.
Primer: Small amount of explosive found at the opposite end of the bullet to the projectile. Used in large caliber bullets to ignite the powder.
Centrefire: Any bullet that contains a primer.
Rimfire: Small-caliber cartridge in which the same explosive material inside of a primer is throughout the entire "rim" (or, the back end consisting of the rim).
Caliber: The size of a bullet. Using the incorrect caliber in a firearm is very dangerous.
Gauge: The size of shotgun shells. The same applies to incorrect gauge usage. Also covers the .410 bore round.
Bolt action: A firearm that requires the bolt to be opened and closed by pulling it back then pushing it forth to eject the shell after firing and replace it if the firearm has another inside the magazine.
Pump action: A firearm that requires a sliding pump to be pulled back and forth to eject the empty shell after firing. Common on shotguns and some rifles. There are a few rifles that are pump-action. Very few in America (Winchester is the only one I know, made ot exact specifications as their police shotgun), but very popular in Australia.
Lever Action: Commonly used in hunting rifles and some shotguns. Quite popular for small-bore due to ease of use. The lever must be pushed down, then back up to eject the casing and load a new round. Made famous by cowboy movies, it was the first repeating rifle (Common calibers include .22LR, .30-30WIN, .357 (which also fires .38 special), and other obscure calibers)
Semi-automatic: A round is fired and cycles to the next every time the trigger is pulled. No need to manually eject the casing.
Selective fire: Fires a preset number of shots every time the trigger is pulled.
Automatic: Holding down the trigger causes firing and cycling to happen automatically, firing many rounds.
Iron sights: The basic sights on any firearm. Two points that must be aligned visually to determine where the bullet goes.
Scope: A telescopic sight that allows the shooter to view distant objects up close. Aim by putting the crosshair over your target.
Laser sight: An attached laser that sends a beam to 'paint' a coloured dot on the target ahead of you.
Red dot scope: Much like a telescopic sight in nature but uses a laser as the crosshair and does not have the same magnification. The laser does not leave the scope.
Trigger: Pull this to fire the weapon.
Chamber: The place in the gun where the cartridge waits until it is needed to fire. Connected to the barrel.
Magazine: Stores cartridges until the are cycled into the chamber.
Internal Magazine: Built into the firearm. Generally tubular for pump action and lever action firearms.
COM: Center Of Mass. As John Wayne once said, “Shoot ‘em where they’re biggest, and do it more than once.” COM is the largest portion on the average human body, which is the chest.
MOA: Minute Of Angle. 1 MOA subtends (meaning the bullet drops) approximately one inch at 100 yards, a traditional distance on target ranges. A shooter can easily readjust his rifle scope by measuring the distance in inches the bullet hole is from the desired impact point, and adjusting the scope that many MOA in the same direction. Most target scopes designed for long distances are adjustable in quarter (¼) or eighth (⅛) MOA "clicks". One eighth MOA is equal to approximately an eighth of an inch at 100 yards or one inch at 800 yards
Tracer: special bullets that are modified to accept a small pyrotechnic charge in their base. Ignited upon firing, the composition burns very brightly making the projectile visible to the naked eye. This enables the shooter to follow the bullet trajectory relative to the target in order to make corrections to his aim. Also used to direct fire, as it is visible to team mates.
Hollowpoint: bullet that has a pit, or hollowed out shape, in its tip, generally intended to cause the bullet to expand upon entering a target in order to decrease penetration and disrupt more tissue as it travels through the target. As a side effect, hollow-point bullets can offer improved accuracy by shifting the center of gravity of the bullet rearwards.
http://upload.wikimedia.org/wikipedia/commons/8/8d/Hollow_point.JPG
JHP: Jacketed Hollow Point. covered in a coating of harder metal to increase bullet strength and to prevent fouling the barrel with lead stripped from the bullet.
(See right of following image)
http://en.wikipedia.org/wiki/Image:JSP_and_JHP_bullets.jpg
JSP: Jacketed Soft Point. See left from above. Similar to HP, but expands more slowly.
AP: Armor Piercing. Bullet with depleted uranium core. Typical soft-armor vests won’t stop any rifle round, and generally stop at the 9mm pistol round. See Also: FMJ
FMJ: Full Metal Jacket. A normal bullet encased with a harder material such as copper, steel, etc. The jacket allows for higher muzzle velocities than bare lead without depositing significant amounts of metal in the bore. It also prevents damage to bores from steel or armor piercing core materials. This bullet type distinguishes itself from hollow point bullets. Generally punch right through basic cloth vests.
Bump-Fire: the act of using the recoil of a firearm with or without a stock to fire multiple rounds in rapid succession. This process is achieved by holding the weapon in a normal firing position, releasing the grip on the firing hand (leaving the trigger finger in its normal position), pushing the rifle forward in order to apply pressure on the trigger finger from the trigger, and keeping the trigger finger near the same position. Since the firearm will recoil against the shoulder and then return to its previous position after the round has been fired -- thus pushing the trigger against the trigger finger again -- large bursts can be fired.
For general bullet terminology, visit
http://en.wikipedia.org/wiki/Bullet and look around. There are far too many to list them all here.
I got bored. Shitload to come later. Thank you Uryu Ishida for all your help.
Why n00bs should avoid guns
A cop of all people
Ouch
HEADSHOT!
Large Caliber Handgun = Pain
I thought these people were trained
Accidents happen
Ricochet
Why marksmanship is important
Another headshot
The importance of a safety catch
Friendly fire
Never go for the big guns
Darwin was right
Guns and alcohol do not mix 
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