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Bravo Course > First 13 Pages Of Book > Flashcards

First 13 Pages Of Book Flashcards

1
Q

Cycle of operations

A 
Feeding
Chambering
Locking
Firing
Unlocking
Extracting
Ejecting 
Cocking
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2
Q

Feeding mechanisms

A

Magazines
Belts
Clips

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3
Q

Magazine types

A

Box (staggered or in line)
Drum
Pan

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4
Q

Types of belt

A 
Split-link (180 degree encase)
Fully encased (360 degree encased)

Disintegrating (belt Dallas apart after firing)
Non-disintegrating

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5
Q

Clip types

A

En-bloc clip

Stripper (charger) clip

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6
Q

5 types of cartridge cases

A

Rimmed (larger base, no milled extractor groove)

Semi-rimmed (larger base, has milled groove)

Rimless (same size base, has mulled groove

Belted (cartridge with rimless base, has thick band/belt just forward of milled groove)

Rebated (smaller base, has milled groove)

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7
Q

5 veriaties of firing pins

A 
Free floating
Inertia
Percussion
Striker
Fixed
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8
Q

3 ways firing pins receive energy

A

Larger mass strikes pin (free floating)

Spring provides energy (inertia, perc., striker)

Their own mass provides energy (fixed)

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9
Q

Components of primers

A

Cup, explosive, protective foil, anvil in primer or in cartridge case

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10
Q

Two types of primer

A

Berdan (anvil in cartridge case, two flash holes) non-reloadable

Boxer (anvil built in primer, one flash hole)

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11
Q

Locking systems

A 
Rotating bolt
Rising/lowering bolt
Roller
Rising barrel
Locking flaps
Swinging bolt
Locking block
Rotating barrel
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12
Q

Operating systems

A 
Bolt action
Blowback
Delayed blowback
Recoil
Recoil with gas assist
Gas operation 
Manual pump
Revolving cylinder
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13
Q

Types of gas operation operating systems

A

Gas blast
Gas tappet
Gas direct

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14
Q

3 types of recoil

A

Long action, short action, inertia

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15
Q

3 types of sights

A

Fixed, adjustable, back-up

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16
Q

Cartridge case type

A 
Rimmed
Semi rimmed 
Rimless
Belted
Rebated
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17
Q

Cartridge case measurement military

A

Diameter of projectile X length of cartridge case expressed in mm

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18
Q

Caliber measurement

A

Distance across the bore of the weapon from land to land expressed in 100th of an inch

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19
Q

MOA

A

1 degree= 16 MOA
1MOA at 100 yards =1 inch
Error at 1000 yards= .5 inches

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20
Q

MIL angular measurement

A

1 Mil=3.5 MOA

1mil at 100 m=10 cm

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21
Q

Shotgun shell components

A 
Crimp
Case
Shot
Wad 
powder
Brass head primer
22
Q

Shotgun gauges

A

Number of balls required to equal 1 pound

23
Q

Choke

A

Tapered constriction of barrels bore at muzzle end, tightens the spread pattern

24
Q

Types of choke

A

Full
Improved
Modified
Cylinder

25
Q

Parts of trajectory

A

Rising branch
Maximum ordinate
Falling branch

26
Q

Rising branch

A

Part of trajectory when bullet leaves barrel until just before max ordinate

27
Q

Maximum ordinate

A

Highest point of bullet trajectory, usually about 2/3 distance to target, never higher than bore line

28
Q

Falling branch

A

Max ord. To target

29
Q

Ballistics def.

A

Science and study of the motion and impact of projectiles

30
Q

Types of ballistics

A

Internal
External
Terminal

31
Q

Battle sight

A

The range that allows you to hit the target between the throat and waist with out sight adjustments.

32
Q

Breech

A

Outside rear face of the barrel which meets the face of the bolt or breechblock

33
Q

Breechblock

A

A component that seals the breech and blocks gases from the fired cartridge.

34
Q

Chamber

A

The unruffled portion of the bore at the rear end of the barrel that receives and supports the cartridge when the breech is closed.

35
Q

Fluted chamber

A

Chamber with raised lands to improve cartridge extraction.

36
Q

Compensator

A

A device attached to the muzzle of a weapon designed to allow the gases following a bullet out of the muzzle to be deflected upward through slots in the top surface of the compensator. Lower portion is solid, so while some gas escapes from the top, gas is also pushing down against the bottom. This downward pressure keeps the muzzle down which retards muzzle climb which is an instability factor

37
Q

Disconnector

A

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

38
Q

Ejector

A

A cam or projection inside the receiver against which the cartridge case strikes and is thrown clear of the mechanism after it has been drawn from the chamber by the extractor.

39
Q

Extractor

A

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

40
Q

Firing pin

A

The part of the firing mechanism that strikes or contacts the primer of the cartridge to cause ignition to fire the weapon

41
Q

Flash suppressor

A

A 3 or 4 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 reduce the flash.

42
Q

Grooves

A

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

43
Q

Headspace

A

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

44
Q

Lands

A

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

45
Q

Muzzle break

A

Device at the muzzle end of the weapon which deflects the emerging powder gases. The energy imported by this act of deflection pulls the weapon forward to offset some of the rearward motion of recoil.

46
Q

Primer

A

Small charge that is detonated by the firing pin, which in turn ignites the powder of propelling charge on the cartridge.

47
Q

Recoil

A

Rearward movement of weapon caused by the expansion of the powder gases which act to thrust the projectile forward on the barrel and react to move the weapon rearward.

48
Q

Sear

A

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

49
Q

Trigger

A

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

50
Q

Trigger bar

A

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

51
Q

Fors

A

Forward opposite

Back same

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