Terms

Question 1

Breech

Answer 1

The outside, rear face of the barrel which meets the face of the bolt or breechblock.

Question 2

Breechblock

Answer 2

The component which seals the breech and blocks gases from the fired cartridge from exiting to the rear of the chamber.

Bolts in Rifles and Machine Guns
Inside of the slide in pistols

Question 3

Cartridge

Answer 3

Consists of the cartridge case and the bullet.

Question 4

Cartridge Case

Answer 4

Does not contain a bullet.

Question 5

Headspace

Answer 5

The distance from the breechblock to the part of the chamber that stops the forward movement of the cartridge case.

Question 6

Go Gauge

Answer 6

This gauge will fit the weapon’s headspace and the weapon will chamber as normal.

Question 7

No Go Gauge

Answer 7

This gauge should not fit the weapon’s headspace; therefore the weapon should not chamber properly or lock.

If the gauge does fit the weapon’s headspace then the weapon is no longer serviceable because the headspace has expanded most likely due to extreme usage.

Question 8

Field Gauge

Answer 8

This is used to determine when a weapon is outside of its specs and no longer used.

Question 9

Muzzle Break

Answer 9

A device at the end of the weapon which reflects the gases as they exit the muzzle of the weapon; this in turn helps to reduce some of the rearward felt recoil.