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Light Side > Base Ops > Flashcards

Base Ops Flashcards

1
Q

Breechblock

A

Seals the breech and blocks gases from exiting the chamber. Gives gases direction

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2
Q

Cartridge

A

Consists of cartridge case and bullet

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3
Q

Cartridge case

A

Does not contain a bullet

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4
Q

Fluted chamber

A

Slots cut into the chamber which allow gases from fired cartridge to enter the chamber and create a buffer between case and chamber wall that aids in extraction of cartridge case
Will leave horizontal burn marks on the case

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5
Q

Lands

A

Raised portion of rifling that impart the spinning motion

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6
Q

Grooves

A

The valley portion that in conjunction with lands impart spinning motion

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7
Q

Extractor

A

Component that engages extractor grooves on the cartridge case. Used to pull the case from the chamber

attached to the bolt

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8
Q

Internal Ballistics

A

All that happens within a firearm from the moment the primer ignites until the bullet leaves the barrel

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9
Q

External ballistics

A

Concerned with the path of the bullet from the muzzle to the target

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10
Q

Terminal ballistics

A

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

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11
Q

Caliber

A

The distance across the bore of a weapon measured from land to land expressed in hundredths of an inch

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12
Q

Trajectory

A

The path of the bullet from the muzzle to the target

  1. Rising branch
  2. Maximum ordinate
  3. Falling branch

Bullet will never rise above bore line

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13
Q

5 types of firing

A 
Single Action
Double Action
Semi-Auto only
Auto-only 
Selective fire
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14
Q

Single Action

A

The weapon will only fire when it has been manually cocked

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15
Q

Double action

A

The trigger bar will cock the weapon when the trigger is pulled and the sear will release the hammer when the trigger has reached its maximum rearward movement

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16
Q

Semi-Auto only

A

The weapon will fire only one round per pull of the trigger

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17
Q

Auto-Only

A

The weapon will fire continuously until the trigger is released

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18
Q

Selective Fire

A

The weapon can fire semi-auto or fully auto

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19
Q

MOA->Inch

A

1 MOA= 1.047 inches or 1 inch at 100 yards

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20
Q

MOA->cm

A

1 MOA= 2.87cm or 3cm at 100m

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21
Q

MIL->MOA

A

1 MIL=3.375 MOA or 3.5 MOA

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22
Q

Types of Feeding Mechanisms

A

Magazines
Belts
Clips

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23
Q

Types of Magazines

A

Box (Staggered/In-line)
Pan
Drum

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24
Q

Types of Belts

A

Split Link
Fully Incased Link
Disintegrating Link
Non-Disintegrating Link

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25
Q

types of clips

A

Stripper

En-Block

26
Q

Types of military Cartridge

A 
Rimmed
Semi-Rimmed
Rimless
Belt
Rebated
27
Q

Types of Ammo

A

Center Fire

Rim Fire

28
Q

parts of cartridge

A

Bullet
Case
Primer
Powder

29
Q

types of bullet tips

A

Spitzer

Round Nose

30
Q

Choke

A

Tapered constriction at the muzzle end of a shotgun’s barrel

Increases effective range

31
Q

types of chokes

A

Full
Modified
Improved cylinder
Cylinder

32
Q

Breech

A

The outside rear face of the barrel that meets the face of the bolt

33
Q

Headspace

A

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

34
Q

Muzzle Brake

A

Device attached to end of muzzle that deflects emerging gases. Energy imparted pulls weapon forward to offset rearward recoil

35
Q

Rifling

A

Spiral grooves in the bore of the barrel which impart a spinning motion on the bullet

36
Q

Ejector

A

Presses against cartridge case to push it out of the mechanism

  • 180* opposite of the ejection port
  • Fixed or spring loaded
37
Q

Disconnector

A

Prevents the firing of more than one shot per pull of the trigger. Prevents firing until the action is fully closed

38
Q

Sear

A

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

39
Q

Trigger

A

Finger actuated lever that activated the firing mechanism. When pulled, fires the weapon

40
Q

Battle Sight

A

The range at which you can hit a target between the throat and waist without making a sight adjustment

41
Q

Trigger Bar

A

Mere extension of the trigger. Connects the sear and trigger

42
Q

Ballistics

A

The study and science of the motion and impact of projectiles

43
Q

5 categories of firing pins

A 
Free floating
Striker
Percussion
Inertia 
Fixed
44
Q

3 types of ballistics

A

Internal
External
Terminal

45
Q

8 types of locking systems

A 
Rotating bolt
Rising/lowering bolt
Swinging bolt
Rotating barrel
Rising barrel
Locking flaps
Locking block
Roller
46
Q

8 cycles of operation

A 
Feeding
Chambering 
Locking
Firing
Unlocking
Extracting
Ejecting
Cocking
47
Q

8 types of operating systems

A 
Bolt action
Blowback
Delayed blowback
Recoil
Recoil with gas assist
Gas operated
Manual pump
Rotating cylinder
48
Q

3 types of gas operated

A

Gas blast
Gas tappet
Gas direct

49
Q

types of primer

A

Boxer (reloadable, one flash hole)

Berdan (two flash holes)

50
Q

4 rules of weapon safety

A

Treat every weapon as if it’s loaded
Never aim at something you aren’t willing to destroy
Keep your finger off the trigger until ready to fire
Be sure of your target and what’s beyond it

51
Q

Angular Measurements

A

1 MIL= 10cm at 100m

= 1m at 1,000m or 1km

52
Q

Hybrid muzzle device

A

Combined reduction in flash signature, recoil, and muzzle climb

53
Q

Compensator

A

Device attached to muzzle allowing gases to be deflected upward through the top slots. Lower portion is solid causing gases to push muzzle down, retarding muzzle climb

54
Q

Flash suppressor

A

3 or 4 pronged device attached to the muzzle designed to cool hot gases as they leave the muzzle behind the round, reducing flash

55
Q

3 ways to measure headspace

A
  1. Pistol cartridge= breechblock->straight wall/mouth of the cartridge case
  2. Rimmed Case= just the width of the rim
  3. Rimless case= breechblock->Datum line
56
Q

Silencer

A

Device attached to muzzle end of firearm which muffles the sound of the expanding gases when a round is discharged

57
Q

Types of muzzle devices

A
  1. Flash suppressor
  2. Muzzle brake
  3. Compensator
  4. Hybrids
58
Q

Shot shell components

A 
Crimp
Case
Shot
Wad
Powder charge
Brass head
Primer
59
Q

Civilian cartridge measurement (caliber)

A

The distance across the bore of a weapon, measured from land to land, expressed in hundredths of an inch

60
Q

Military cartridge measurement

A

Bullet diameter x cartridge case length expressed in mm

61
Q

Bullet bases

A

Boat tail

Flat base

62
Q

Types of recoil operating systems

A
  1. Long action= barrel and bolt recoil all the way back as a complete unit
  2. Short action= barrel and bolt recoil only a short distance together before unlocking and separating. (Glock)
  3. Inertia action= entire firearm recoils while the bolt stays in place (Bennelli)

Light Side (6 decks)

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