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18B Light Weapons week 1&2 > Basic Operations > Flashcards

Basic Operations Flashcards

1
Q

What are the three types of ballistics?

A
  • Internal
  • External
  • Terminal
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2
Q

8 Order of Operations in order?

A 
Feeding 
Chambering 
Locking 
Firing 
Unlocking 
Extracting 
Ejecting 
Cocking
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3
Q

What are the Types of Feed?

A

Magazines
Belts
Clips

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4
Q

Types of Magazines?

A

Box
Drum
Pan

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5
Q

Types of Belts?

A

Split Link
Fully Encased Link
Non Disintegrating Link Belt
Disintegrating Link Belt

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6
Q

Types of Clips?

A

En-Bloc Clip

Stripper Clip

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7
Q

What are the Five types of cartridges?

A 
Rimmed Cartridge 
Rimless Cartridge 
Rebated Cartridge 
Semi-Rimmed Cartridge 
Belted Cartridge
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8
Q

What are the 5 types of firing pins?

A 
Free Floating 
Inertia 
Percussion 
Striker 
Fixed
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9
Q

Name the Locking Systems

A 
Rotating Bolt 
Rising/Lowering Bolt 
Swinging Bolt 
Rising Barrel 
Rotating Barrel
Locking Block 
Locking Flaps 
Roller
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10
Q

Name the 8 operating systems

A 
Bolt Action 
Recoil 
Recoil with Gas Assist 
Blowback 
Delayed blowback 
Gas Operation 
Manual Pump
Revolving Cylinder
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11
Q

Civilians use what form of measurement for cartridges? Define how it’s measured?

A

Caliber-

Distance across bore of weapon. Measured from land to land. Expressed in 100’s of an inch

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12
Q

Define Breechblock

A

Component that seals and prevents gases from exiting the rear of the breech and blocks gases from fired cartridge

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13
Q

Define Disconnector

A

Device incorporated into the action of weapon, preventing firing of more than one shot for one pull of trigger, or prevents the weapon from being fired until action is fully closed.

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14
Q

Define Ejector

A

Cam or projection inside receiver against which the cartridge case strikes and is thrown clear of the mechanism after being drawn from chamber by extractor.

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15
Q

Define Extractor

A

Component which engages the rim or extractor groove of cartridge case while cartridge is in chamber. After firing the extractor withdraws the case from chamber when action opens.

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16
Q

What are the 3 measurements/names of trajectory a bullet goes through from start to finish?

A

Rising Branch
Max Ordinance
Falling Branch

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17
Q

What is Headspace?

A

Distance from breechblock to part of chamber that stops forward movement of cartridge case.

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18
Q

What will leave horizontal burn marks on the spent cartridge?

A

Fluted Chambers

19
Q

What is a SEAR and what does it do?

A

Component retained under spring tension that releases, by means of trigger, either a firing pin, hammer, or bolt.

20
Q

What is a trigger and what does it do?

A

A finger actuated lever used to activate the firing mechanism firing the weapon.

21
Q

What is a trigger bar?

A

A connecting bar operating between the trigger and sear. Nothing more than an extension of the trigger.

22
Q

What are the 5 types of firing?

A 
Single action 
Double action 
Semi-Automatic 
Automatic 
Selective fire
23
Q

What are the two types of primers?

A

Boxer

Berdan

24
Q

Define a BERDAN PRIMER

A

Two flash holes and is not reloadable. Anvil is part of cartridge case

25
Q

Define a BOXER PRIMER

A

Has one flash hole, has anvil and flash powder built in

26
Q

Military’s way of measuring a bullet/cartridge.

A

Diameter of bullet x length of cartridge case in mm’s

27
Q

Define buffer

A

A part that absorbs shock of moving parts or check the motion of major components during recoil or counter-recoil

28
Q

Define Breech

A

Outside rear face of Barrel that meets the face of the bolt or breechblock

29
Q

Define a choke

A

A tapered constriction of barrels bore at muzzle end

30
Q

Define a compensator

A

A device attached to the muzzle of a weapon designed to allow the gases following the bullet out of the muzzle to be deflected upward through slots in the top surface of the compensator. This pressure against the bottom of the compensator, pushing the compensator down, keeps the muzzle down.

31
Q

Define Flash suppressor

A

A three or four pronged device attached to the muzzle of a weapon designed to cool the hot gases as it leaves the muzzle behind the round, cooling the gases reduces the flash.

32
Q

Define grooves

A

Portion of the rifling in the barrel that in conjunction with the lands impart spinning motion to a bullet.

33
Q

Define lands

A

Raised portion between the grooves in the bore of a gun that impart spinning motion on bullet

34
Q

What is Mechanical Safety

A

An arrangement of components within the action of that prevents the weapon from being fired until action is fully closed and locked

35
Q

Muzzle brake

A

Device at the muzzle end that reflects the emerging powder gases. This pulls the weapon forward, reducing recoil.

36
Q

Stock

A

Attached to receiver that makes it possible for operator to hold aim and fire.

37
Q

Battle Sight

A

The range that allows you to hit a target between the throat and waist without sight adjustment. Exact range varies with caliber

38
Q

Rifling

A

A series of spiral grooves in the bore of a barrel which imparts a spinning motion to the bullet as it travels the length of the barrel from breech to muzzle.

39
Q

Safety

A

A mechanism incorporated into the action of the weapon that by mechanical or manual manipulation prevents the weapon from being fired.

40
Q

Rates of Fire

A

Sustained Rate- Gunners normal Rate of Fire

Rapid Rate- Gunners rate of Fire when trying to gain fire superiority

Cyclic Rate- Gunners rate of Fire during combat emergencies; the maximum number of rounds an automatic weapon can fire in one minute

41
Q

What are the 3 ways firing pins receive their energy? And which firing pins receive which energy?

A
  • a larger mass strikes them
    * Free Floating
  • a spring provides their energy
    * Inertia
    * Percussion
    * Striker
  • their own mass provides the energy
    * Fixed
42
Q

What does a fluted chamber do?

A

Aids in the extraction by allowing gases in chamber, freefloating the cartridge reducing friction, also leaves horizontal burn marks on cartridge.

43
Q

What are the two types of sights?

A

Fixed and adjustable

44
Q

What do the three leafs do in the 1911, from left to right?

A
  1. Forward pressure on sere
  2. Upward pressure on disconnector
  3. Rearward pressure on grip safety

18B Light Weapons week 1&2 (11 decks)

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