Basic Operations Flashcards
What are the three types of ballistics?
- Internal
- External
- Terminal
8 Order of Operations in order?
Feeding Chambering Locking Firing Unlocking Extracting Ejecting Cocking
What are the Types of Feed?
Magazines
Belts
Clips
Types of Magazines?
Box
Drum
Pan
Types of Belts?
Split Link
Fully Encased Link
Non Disintegrating Link Belt
Disintegrating Link Belt
Types of Clips?
En-Bloc Clip
Stripper Clip
What are the Five types of cartridges?
Rimmed Cartridge Rimless Cartridge Rebated Cartridge Semi-Rimmed Cartridge Belted Cartridge
What are the 5 types of firing pins?
Free Floating Inertia Percussion Striker Fixed
Name the Locking Systems
Rotating Bolt Rising/Lowering Bolt Swinging Bolt Rising Barrel Rotating Barrel Locking Block Locking Flaps Roller
Name the 8 operating systems
Bolt Action Recoil Recoil with Gas Assist Blowback Delayed blowback Gas Operation Manual Pump Revolving Cylinder
Civilians use what form of measurement for cartridges? Define how it’s measured?
Caliber-
Distance across bore of weapon. Measured from land to land. Expressed in 100’s of an inch
Define Breechblock
Component that seals and prevents gases from exiting the rear of the breech and blocks gases from fired cartridge
Define Disconnector
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.
Define Ejector
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.
Define Extractor
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.
What are the 3 measurements/names of trajectory a bullet goes through from start to finish?
Rising Branch
Max Ordinance
Falling Branch
What is Headspace?
Distance from breechblock to part of chamber that stops forward movement of cartridge case.
What will leave horizontal burn marks on the spent cartridge?
Fluted Chambers
What is a SEAR and what does it do?
Component retained under spring tension that releases, by means of trigger, either a firing pin, hammer, or bolt.
What is a trigger and what does it do?
A finger actuated lever used to activate the firing mechanism firing the weapon.
What is a trigger bar?
A connecting bar operating between the trigger and sear. Nothing more than an extension of the trigger.
What are the 5 types of firing?
Single action Double action Semi-Automatic Automatic Selective fire
What are the two types of primers?
Boxer
Berdan
Define a BERDAN PRIMER
Two flash holes and is not reloadable. Anvil is part of cartridge case
Define a BOXER PRIMER
Has one flash hole, has anvil and flash powder built in
Military’s way of measuring a bullet/cartridge.
Diameter of bullet x length of cartridge case in mm’s
Define buffer
A part that absorbs shock of moving parts or check the motion of major components during recoil or counter-recoil
Define Breech
Outside rear face of Barrel that meets the face of the bolt or breechblock
Define a choke
A tapered constriction of barrels bore at muzzle end
Define a compensator
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.
Define Flash suppressor
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.
Define grooves
Portion of the rifling in the barrel that in conjunction with the lands impart spinning motion to a bullet.
Define lands
Raised portion between the grooves in the bore of a gun that impart spinning motion on bullet
What is Mechanical Safety
An arrangement of components within the action of that prevents the weapon from being fired until action is fully closed and locked
Muzzle brake
Device at the muzzle end that reflects the emerging powder gases. This pulls the weapon forward, reducing recoil.
Stock
Attached to receiver that makes it possible for operator to hold aim and fire.
Battle Sight
The range that allows you to hit a target between the throat and waist without sight adjustment. Exact range varies with caliber
Rifling
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.
Safety
A mechanism incorporated into the action of the weapon that by mechanical or manual manipulation prevents the weapon from being fired.
Rates of Fire
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
What are the 3 ways firing pins receive their energy? And which firing pins receive which energy?
- a larger mass strikes them
* Free Floating - a spring provides their energy
* Inertia
* Percussion
* Striker - their own mass provides the energy
* Fixed
What does a fluted chamber do?
Aids in the extraction by allowing gases in chamber, freefloating the cartridge reducing friction, also leaves horizontal burn marks on cartridge.
What are the two types of sights?
Fixed and adjustable
What do the three leafs do in the 1911, from left to right?
- Forward pressure on sere
- Upward pressure on disconnector
- Rearward pressure on grip safety
