Vocab Flashcards
Types of Sights
Fixed
Adjustable
Battle sight
Define choke
Tapered constrition of the barrels bore at the muzzle end.
Components of a shotgun shell
Crimp Case Shot inside Wad Powder Brass head Primer
List the types of feeding mechanisms
Magazines (Box, pan, and drum)
Belts
Clips (En bloc, stripper)
List the types of belts
SLD MLB, SLND MLB
FED MLB, FEND MLB
Name the types of cartridges
Rimmed, semi-rimmed, rimless, belted, and rebated
Name the types of firing pins
Free floating Inertia Percussion Striker Fixed
List the types of bullet shapes
Spitzer
Round
Flat base
Name the types of primers
Boxer and berdan
List the types of locking systems
Rotating bolt Rising/ Lowering bolt Roller Rising barrel Locking flaps Swinging bolt Locking block Rotating barrel
List the types of operating systems
Blowback Delayed blowback Gas Operation (Gas blast, direct, and tappet) Recoil with gas assist Recoil Revolving cylinder Manual pump
Name the types of action recoils
Long action recoil
Short action recoil
Inertia action recoil
Define breechblock
A components that seals the breech and blocks gases from the fired cartridge from exiting to the rear of the chamber
Define compensator
A device attached to the muzzle of a weapon designed to allow gases following the bullet out of the muzzle to be deflected upward through slots in the top surface of the compensator
Define disconnector
A device incorporated into the action of a weapon which prevents the firing of more and one shot for one pull of the trigger or which prevents the weapon from being fired until the action if fully closed
Define 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
Define extractor
a component that engages the rim, or extractor groove of the cartridge case while the cartridge is in the chamber.
Flash suppressor (Flash hider)
a three or four pronged device attached to the muzzle of a weapon designed to cool hot gases as it leaves the muzzle behind the round, cooling the gases reduces the flash
(Duckbill, birdcage)
Define headspace
The distance from the breechblock to that part of the chamber which stops the forward movement of the cartridge case
Fluted Chamber
Leaves horizontal burn marks on spent cartridge case produced by the gases that cycle the weapon and aid in extraction by floating the cartridge case
Define muzzle brake
A device at the muzzle end of the weapon which deflects the emerging powder gases. The energy imparted by this act of deflection pulls the weapon forward to offset some of the rearward motion of recoil
Define muzzle flash
The incandescent flash in the air at the muzzle of the weapon which occurred when the bullet leaves the barrel
Define rifling
A series of spiral grooves in the bore of the a barrel which imparts a spinning motion to the bullet as it travels the length of the barrel from the breech to the muzzle
Define sear
A component retained under spring tension that when releases, usually by a trigger, either a hammer, bolt, or firing pin
Define trigger
A finger actuated lever used to activate the firing mechanism firing the weapon
Define trigger bar
A connecting bar operating between the trigger and the sear
Name the types of trajectory branches
Rising branch, maximum ordinate, and falling branch
Name the types of ballistics
Internal, external, and terminal
Define battle sight
The range that allows you to hit a target between the throat and the waist without a single adjustment
Define caliber
The distance across the bore from land to land expressed in hundredths of an inch
Locking lugs
Carefully machined protuberances on the bolt that engage recesses in a non-moving component in the receiver to assist in securely sealing the breech during the initial moment of firing
