Basic Operations Flashcards
EIGHT STEPS IN THE CYCLE OF OPERATION
Feeding, chambering, locking, firing, unlocking, extracting, ejecting, cocking
FEEDING MECHANISMS
Magazine
Box (inline, staggered)
Pan
Drum
Belt
Split link disintegrating
Split link non-disintegrating
Fully encased disintegrating
Full encased non-disintegrating
Clip
En-bloc clip
Stripper clip (charger clip)
FIVE TYPES OF CARTRIDGES
Rimmed, semi-rimmed, rimless, belted, rebated
FIVE VARIETIES OF FIRING PIN
Free-floating, inertia, percussion, striker, fixed
TWO TYPES OF PRIMERS
Boxer, berdan
EIGHT LOCKING SYSTEMS
Rotating bolt, rising/lowering bolt, swinging bolt, locking flaps, locking block, roller, rising barrel, rotating barrel
EIGHT OPERATING SYSTEMS
Bolt action, blowback, delaying blowback, recoil, recoil with gas assist, gas operation (direct, blast, tappet), manual pump, revolving cylinder
THREE TYPES OF BALLISTICS
Internal, external, terminal
BATTLE SIGHT
The range that allows you to hit the target between the throat and waist without sight adjustment. Exact range varies with caliber of weapon.
BREECHBLOCK
A Component that seals the breech and blocks gases from the fired cartridge (bolts in rifles, slides in pistols).
CALIBER
The distance across the bore of a weapon, measured from land to land expressed in hundredths of an inch.
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.
EJECTOR
A cam of 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.
THREE TYPES OF MUZZLE DEVICES
Flash suppressor, compensator, muzzle brake
HAMMER
The component of the firing mechanism that imparts a sharp blow to the firing pin to initiate the primer.
HEADSPACE
The distance from the breechblock to that part of the chamber which stops the forward movement of the cartridge case.
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 the breech to the muzzle.
SEAR
A component retained under spring tension that releases, by means of a trigger, either a firing pin, hammer, or bolt.
TRIGGER
A finger actuated lever used to activate the firing mechanism firing the weapon.
TRIGGER BAR
A connection bar operating between the trigger and the sear. Nothing more than an extension of the trigger.
FIVE TYPES OF FIRING
Single action, double action, semi-automatic, automatic, selective fire
