Basic Operations Small Arms

Question 1

8 steps in the cycle of operation

Answer 1

Feeding
Chambering 
Locking
Firing
Unlocking
Extracting
Ejecting
Cocking

Question 2

5 types of cartridges

Answer 2

Rimmed
Semi-rimmed
Rimless
Belted
Rebated

Question 3

5 varieties of firing pins

Answer 3

Free floating
Inertia 
percussion
Striker
Fixed

Question 4

2 types of primers

Answer 4

Boxer

Berdan

Question 5

8 locking systems

Answer 5

Rotating bolt
Rising/lowering bolt
Roller
Rising barrel
Locking flaps
Swinging bolt
Locking block
Rotating barrel

Question 6

8 operating systems

Answer 6

Bolt action
Blowback
Delayed blowback
Recoil
Recoil with gas assist
Gas operation
Manual pump
Revolving cylinder

Question 7

Accelerator

Answer 7

A device that operates during rearward movement of the recoiling parts to increase the speed at which certain parts move. When the rate of the bolt or breechblock increases, the rate of fire increases

Question 8

Accelerator

Answer 8

A device that operates during the rearward movement of the recoiling parts to increase the speed at which certain parts move. In general, when rate of movement of the bolt or breechblock is increased, the rate of fire is increased

Question 9

Automatic

Answer 9

A weapon in which the first round is manually positioned in the chamber, or to be chambered, after the first round is fired, the empty case is ejected and the new round is chambered and fired. This action continues until the trigger is released or the ammo is expended.

Question 10

Semi-automatic (auto-loading)

Answer 10

A weapon in which the first round is manually positioned in the chamber, or to be chambered. After the first round is fired, the casing is extracted and ejected and a new round is chambered, leaving the hammer or firing assembly in the cocked position for the next round. The trigger must be released after each shot and pressure reapplies to fire the next round.

Question 11

Ballistics

Answer 11

The science and study of the motion and impact of projectiles

Question 12

Internal ballistics

Answer 12

The science of projectile motion within a firearm. It is most simply all that happens with in a firearm from the instant the primer ignited until the bullet leaves the barrel.

Question 13

External ballistics

Answer 13

Concerns the path of the bullet from the muzzle to the target

Question 14

Terminal ballistics

Answer 14

Concerns what happens to the bullet after it hits the target and what the bullet actually does to the target upon impact.

Question 15

Battle sight

Answer 15

Range that allows you to hit the target between the throat and waist with out sight adjustments. Exact range varies with caliber of weapon.

Question 16

Barrel

Answer 16

Portion of weapon through which a projectile is propelled by action of the gases generated by the burning propellant charge.

Question 17

Bolt

Answer 17

A major component of a firearm whose main function is to support the base of the cartridge and seal the chamber when the cartridge is fired, the bolt may contain other sub assemblies such as firing pin, locking lugs, extractor, and ejector. The bolt generally moves forward and backward in the receiver in a motio lomgtudinal to the axis of the bore. During the forward movement of the bolt the cartridge is chambered and the chamber odds sealed by the face of the bolt. During the rearward movement the fired cartridge is extracted from the chamber and ejected from the receiver. The bolt is also referred to as the breechblock.

Question 18

Bolt carrier

Answer 18

A component of the firing mechanism that carried the bolt and which usually contains grooves cans or lugs that assist in locking the bolt forward position during firing. Manual unlocking of bolt is often accomplished by moving the bolt carrier through an attached handle.

Question 19

Bolt handle

Answer 19

A handle or projection attached to the bolt that can be grasped in order to manually open or close the bolt

Question 20

Breech

Answer 20

The outside rear v face of the barrel which meets the face of the bolt of breechblock

Question 21

Breechblock

Answer 21

A component that seals the breach and blocks gases from the fired cartridge

Question 22

Buffer

Answer 22

A part intended to absorb the shock of moving parts of check the motion of major components during recoil and our counter-recoil

Question 23

Bushing

Answer 23

A detachable Metal lining commonly used around certain parts to provide a better fit than be accomplished by direct machining.

Question 24

Caliber

Answer 24

Distance across the bore of a weapon measured from land to land expressed in hundreds of an inch

Question 25

Cannelure

Answer 25

An invented ring or groove around a bullet into which the cartridge case is roll crimped to keep the bullet firmly attached to the car