Base Ops Flashcards
8 steps in the cycles of operation
- feeding
- chambering
- locking
- firing
- unlocking
- extracting
- ejecting
- cocking
Feeding mechanisms
- Magazines
- Belts
- Clips
Types of magazines
- Box(staggered, in line)
- Drum
- Pan
Types of belts
Split link
Fully encased link
Non disintegrating link belt
Disintegrating link belt
Types of clips
En bloc
Stripper clip
5 types of cartridges
- Rimmed
- Semi rimmed
- Rimless
- Belted
- Rebated
5 varieties of firing pins
- Free floating
- Inertia
- Percussion
- Striker
- Fixed
The three ways fire pins receive their energy
1. Large mass strikes them Free floating 2. A spring provides their energy Inertia Percussion Striker 3. They own mass provides energy Fixed
Two types of primers
- Boxer- one flash hole. The boxer had a cup shaped igniting system having the anvil and flash powder built in
- Berdan- two flash holes. The berdan contains only the flash powder, the anvil is part of the cartridge case and has two flash holes. Non reload able
8 locking system
- Rotating bolt
- Rising/lowering bolt
- Roller
- Rising barrel
- Locking flaps
- Swinging bolt
- Locking block
- Rotating barrel
8 operation systems
- Bolt action
- Blowback
- Delayed blowback
- Recoil
- Recoil with gas assist
- Gas operation
- gas blast
- gas tappet
- gas direct - Manuel pump
- Revolving cyclinder
Battle sight
The range that allows you to hit the target between the throat and waist without site adjustment. Exact range varies with caliber of weapon
Breech
The outside rear face of the barrel which meets the face of the bolt or breech block
Breech block
A component that seals the breech and blocks the gases from the fired cartridge
Caliber
The distance across the bore of a weapon, measured from land to land expressed in hundredths of a inch.
Disconnector
A device incorporated in the action of a weapon which prevents the weapon from firing more than one round for one pull of the trigger. Or which prevents them weapon from firing until the action is fully closed.
Ejector
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
Extractor
A component that engages 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
Headspace
The distance from the breech block to the part of the chamber which’s stops the foreword movement of the cartridge case.
Rifiling
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
Sear
A component retained under spring tension which release by means of a trigger either a firing,hammer, or bolt
Trigger
A finger activated lever used to activate the firing mechanism firing the weapon
Trigger bar
A connecting bar operating between the trigger and the sear. Nothing more than an extension of the trigger.
Types of firing
Single action (SA) Double action (DA) Semi auto ( semi auto only) Automatic ( auto only) Selective fire ( sel- fire)
