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18B Light Weapons > Base Operations > Flashcards

Flashcards in Base Operations Deck (30)
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1

What are the 8 cycles of operation?

1. Feeding
2. Chambering
3. Locking
4. Firing
5. Unlocking
6. Extracting
7. Ejecting
8. Cocking

2

What are the 3 types of magazines?

Box (Staggered/In Line)
Drum
Pan

3

What are the 4 types of belts?

Split Link
Fully Encased Link
Non-Disintegrating Link
Disintegrating Link

4

What are the 2 types of clips?

En-bloc
Stripper (Charger)

5

What are the 5 types of cartridges?

Rimmed
Semi-rimmed
Rimless
Belted
Rebated

6

What is... 'a cartridge which has a head larger in diameter than the body, forming a rim or flange'?

Rimmed Cartridge

7

What is... 'a cartridge that has a head only slightly larger in diameter than the body, with a shallow groove machined around the circumference of the body forward of the head to provide an extractor gripping surface'?

Semi-Rimmed Cartridge

8

What is... 'a cartridge that has a head the same diameter as the body, with a groove machined around the circumference of the body forward of the head to provide an extractor gripping surface'?

Rimless Cartridge

9

What is... 'a cartridge of the rimless type which has a thick band or belt around the body just forward of the extractor groove to provide strength in that portion of the case'?

Belted Cartridge

10

What is... 'a cartridge that has a base smaller than the case'?

Rebated Cartridge

11

What are the 5 types of firing pins?

Free-Floating
Inertia
Percussion
Striker
Fixed

12

What are the 3 possible ways a firing pin receives its energy?

- A larger mass strikes them
- A spring provides the energy
- Their own mass provides the energy

13

What are the 2 types of primers?

Boxer
Berdan

14

Which type of primer only has 1 flash hole?

Boxer

15

In which type of primer is the anvil part of the cartridge case?

Berdan

16

What are the 8 types of locking systems?

Rotating Bolt
Rising/Lowering Bolt
Roller
Rising Barrel
Locking Flaps
Swinging Bolt
Locking Block
Rotating Barrel

17

What are the 8 different Operating Systems?

Bolt Action
Blowback
Delayed Blowback
Recoil
Recoil w/ Gas Assist
Gas Operation (Gas Blast, Gas Tappet, Gas Direct)
Manual Pump
Revolving Cylinder

18

The following describes which operating system?

'the operator manually retracts the bolt to eject the spent cartridge and to chamber a new round by pushing the bolt forward'

Bolt Action

19

The following describes which operating system?

'works by pressure from the fired cartridge. These weapons have no locking system, which means pressure from exploding rounds blows the cartridge case backward, forcing the bolt to the rear and cartridge out of the weapon. A new round is chambered when the bolt moves forward'

Blowback

20

The following describes which operating system?

'these weapons have a locking system, which means there is a delay long enough for the round and excess gas to leave the muzzle before the bolt is fully unlocked'

Delayed Blowback

21

The following describes which operating system?

'works by pressure from fired round. The breech is locked so that when the round is fired, the barrel moves to the rear with the breechblock or bolt in place. The breechblock remains to the rear while the barrel is forced forward by the spring. After the barrel is fully forward the breechblock is released, moving forward to chamber another round'

Recoil

22

The following describes which operating system?

'operates with a recoil booster attached to the muzzle end of the weapon to trap gas, which aids in moving the barrel to the rear'

Recoil w/ Gas Assist

23

The following describes which operating system?

'gas pressure within the barrel is tapped by a gas port inside the barrel, using the energy to force the operating parts to the rear.'

Gas Operation

24

The following describes which operating system?

'gas goes down the gas port into the gas cylinder and makes contact with the gas piston directly attached to the operating rod or slide'

Gas Blast

25

The following describes which operating system?

'gas goes down the gas cylinder and makes contact with the gas piston which makes contact with the operating rod or slide. The gas piston and operating rod or slide are separate components'

Gas Tappet

26

The following describes which operating system?

'gas goes out of the gas port into the gas tube and is carried directly to the bolt or bolt carrier'

Gas Direct

27

The following describes which operating system?

'operator is required to pull the slide to the rear, extracting the fired round, and to push the slide forward chambering a new one'

Manual Pump

28

The following describes which operating system?

'each round is fired when the trigger is pulled. The cylinder rotates aligning on the next chamber with the barrel so that the next round can be fired'

Revolving Cylinder

29

What are the 3 variations of ballistics?

Internal
External
Terminal

30

List the types of firing...

Single Action
Double Action
Semi-Automatic
Automatic
Selective Fire