If You Get 29/35 on This Quiz, You May Be Able to Fake Your Way As a Gunsmith

Semi-automatic weapons use ejectors to push spent cartridges out of the way. This makes room for a fresh round.

The butt is, as you probably guess, the backside of the firearm -- the very end of the stock on a rifle or shotgun. On a handgun, it's the part that you smack against an enemy's head during combat.

Rust doesn't just make a gun's finish look awful, it can actually ruin the weapon. Bluing is a chemical process that prevents the rusting of steel … but only if you care for the gun properly.

Any visible cracks in a firearm should arouse worry. But gunsmiths are particularly worried about any fractures that appear in areas like the chamber, which are subjected to a lot of pressure during shooting.

"Big bore" refers to large ammunition for bigger-than-average guns. For example, many gunsmiths refer to .30-caliber and larger rifles as big bore.

Grain has multiple uses in the gunsmith world. It may refer to the weight of a bullet, or the amount of gunpowder used in a certain cartridge.

Gunsmiths are intimately familiar with muzzle velocity, an indicator of the round's speed as it exits a gun's barrel. Muzzle velocity varies greatly depending on the firearm's configuration and round.

Some gunsmiths say it's mostly for looks. Bolt fluting involves cutting cool-looking groves right into the rifle bolt. Some owners like fluting for its looks and also because it reduces weight (by a small amount).

You have to clean firearms regularly, otherwise they're subject to fouling. Fouling results from buildup of gunpowder residues and other particulates, like dirt.

"Load" is the general term for the overall round that's being fired through the gun. Loads vary widely even for the same gun depending on the intended purpose.

Guns aren't always tools or weapons, they are sometimes objects of beauty. Gun engravers have steady hands that let them create incredibly intricate artwork in a firearm's metals.

A dum-dum is a non-functional cartridge. They allow gunsmiths to dry fire a weapon and test its action without actually shooting a round.

It almost looks like you're breaking the gun in half. Break action weapons snap open via a hinge to allow for easy loading.

Safety is always key in gun making. Gunsmiths use proof loads -- extra powerful rounds -- to make sure the gun is safe to use under normal shooting conditions, and then some.

Muzzle threads allow you to add certain components to a gun, such as a suppressor or flash hider. These add-ons can be invaluable in certain scenarios.

Jacketed bullets are those with a harder metal surrounding a softer core. A full-metal jacket refers to a soft bullet that is completely encased in harder metal.

In guns with a high rate of fire, the sear is critical. It helps prevent the gun from shooting more than one round at a time, otherwise the consequences could be hazardous to the shooter's health.

Action truing can fix a number of issues with factory-made guns. By squaring the receiver face, the barrel will be mounted more precisely in its housing … meaning your aim will be truer.

A lot of guns are imperfect out of the factory. Gunsmiths can follow an action truing process to correct issues with the weapon's action, thereby improving its overall functionality.

The benefits of bolt fluting are debatable. But thanks to smaller surface area, it may help make the bolt easier to operate, although some shooters dispute this idea.

All gunsmiths know how to accurize a gun. The process involves several techniques that make the weapon more accurate.

Chokes narrow the end of a shotgun barrel, altering the spread of the lead shot. A full choke creates a denser pattern than a modified choke.

Armorers are a specialized type of gunsmith. They use their skills mostly to replace gun components that are simply worn out from use.

Receiver is the term used to reference the firing components in general. It's the part that rests between the barrel and the stock.

MOA, or minute of angle, measures the angle of spread as a round travels over distance. Gunsmiths must understand the math behind MOA in order to truly accurize firearms.

Some people say it's one of the most familiar sounds in the world -- the sound of a pump-action shotgun. With one motion, the shooter ejects a spent shell and loads a fresh one.

Parkerization and bluing are two finishing processs. They help to protect the gun's steel parts from corrosion.

Mass-produced guns often have imprecisely cut receiver threads. Gunsmiths can correct this problem so that the cartridge pushes directly into the action instead of at an awkward angle.

It's a common upgrade for bolt-action owners. They'll ask a gunsmith to take off the old knob and add a larger one -- this makes it easier to operate the bolt action thanks to improved leverage.

A checkerer is, ultimately, a sort of teensy saw that lets the gunsmith add checkered flourishes to a stock or forearm. These not only add beauty, but they can improve grip, too.

When bullets are shot through barrels too large for the round, the lead tends to tumble unevenly through the air. The result is a keyhole-shaped pattern in the target.

Rifles have grooved barrels that increase bullet accuracy. The tops of those groove -- the parts that actually touch the bullet -- are the lands.

Let's face it -- bolt fluting looks awesome and it's mostly for aesthetics. It might save you around an ounce on weight, but more likely it'll be even less.

The barrel is a gun's most vital component. This metal tube harness the power of gunpowder and lead, directing it toward the target of your choosing.

"Obturate" is the technical term for the way bullets expand as they pass through a barrel. The better the fit, the better the accuracy.