The Basics of Gun Receivers

What is the basic part of a gun sometimes called a receiver?

A gun receiver is the main part of a firearm that holds all the other components together. It is often referred to as the “heart” or “core” of the gun.

What is an upper and lower receiver?

In some firearms, like rifles, the receiver is divided into two parts: the upper receiver and the lower receiver. The upper receiver houses the barrel, bolt, and other important parts, while the lower receiver contains the trigger mechanism and the magazine.

Do handguns have receivers?

Yes, handguns also have receivers, but they are usually not divided into upper and lower parts like rifles. The receiver in a handgun is the main housing that holds the firing mechanism and the magazine.

What does 80% lower receiver mean?

An 80% lower receiver refers to a partially completed receiver that is not yet considered a firearm by legal standards. It is called “80%” because it is missing some crucial machining steps. People can legally purchase and complete these receivers to build their own firearms.

What parts go into an upper receiver?

An upper receiver typically includes the barrel, bolt carrier group, charging handle, and handguard. These parts work together to facilitate the firing and ejection of bullets.

What part of a rifle has the serial number?

The lower receiver of a rifle is the part that usually bears the serial number. This is because the lower receiver is considered the actual firearm according to legal regulations.