Base Operations Flashcards
What are the 8 cycles of operation?
- Feeding
- Chambering
- Locking
- Firing
- Unlocking
- Extracting
- Ejecting
- Cocking
What are the 3 types of magazines?
Box (Staggered/In Line)
Drum
Pan
What are the 4 types of belts?
Split Link
Fully Encased Link
Non-Disintegrating Link
Disintegrating Link
What are the 2 types of clips?
En-bloc
Stripper (Charger)
What are the 5 types of cartridges?
Rimmed Semi-rimmed Rimless Belted Rebated
What is… ‘a cartridge which has a head larger in diameter than the body, forming a rim or flange’?
Rimmed Cartridge
What is… ‘a cartridge that has a head only slightly larger in diameter than the body, with a shallow groove machined around the circumference of the body forward of the head to provide an extractor gripping surface’?
Semi-Rimmed Cartridge
What is… ‘a cartridge that has a head the same diameter as the body, with a groove machined around the circumference of the body forward of the head to provide an extractor gripping surface’?
Rimless Cartridge
What is… ‘a cartridge of the rimless type which has a thick band or belt around the body just forward of the extractor groove to provide strength in that portion of the case’?
Belted Cartridge
What is… ‘a cartridge that has a base smaller than the case’?
Rebated Cartridge
What are the 5 types of firing pins?
Free-Floating Inertia Percussion Striker Fixed
What are the 3 possible ways a firing pin receives its energy?
- A larger mass strikes them
- A spring provides the energy
- Their own mass provides the energy
What are the 2 types of primers?
Boxer
Berdan
Which type of primer only has 1 flash hole?
Boxer
In which type of primer is the anvil part of the cartridge case?
Berdan
What are the 8 types of locking systems?
Rotating Bolt Rising/Lowering Bolt Roller Rising Barrel Locking Flaps Swinging Bolt Locking Block Rotating Barrel
What are the 8 different Operating Systems?
Bolt Action Blowback Delayed Blowback Recoil Recoil w/ Gas Assist Gas Operation (Gas Blast, Gas Tappet, Gas Direct) Manual Pump Revolving Cylinder
The following describes which operating system?
‘the operator manually retracts the bolt to eject the spent cartridge and to chamber a new round by pushing the bolt forward’
Bolt Action
The following describes which operating system?
‘works by pressure from the fired cartridge. These weapons have no locking system, which means pressure from exploding rounds blows the cartridge case backward, forcing the bolt to the rear and cartridge out of the weapon. A new round is chambered when the bolt moves forward’
Blowback
The following describes which operating system?
‘these weapons have a locking system, which means there is a delay long enough for the round and excess gas to leave the muzzle before the bolt is fully unlocked’
Delayed Blowback
The following describes which operating system?
‘works by pressure from fired round. The breech is locked so that when the round is fired, the barrel moves to the rear with the breechblock or bolt in place. The breechblock remains to the rear while the barrel is forced forward by the spring. After the barrel is fully forward the breechblock is released, moving forward to chamber another round’
Recoil
The following describes which operating system?
‘operates with a recoil booster attached to the muzzle end of the weapon to trap gas, which aids in moving the barrel to the rear’
Recoil w/ Gas Assist
The following describes which operating system?
‘gas pressure within the barrel is tapped by a gas port inside the barrel, using the energy to force the operating parts to the rear.’
Gas Operation
The following describes which operating system?
‘gas goes down the gas port into the gas cylinder and makes contact with the gas piston directly attached to the operating rod or slide’
Gas Blast
