Basic Ops Flashcards

Question

Explain a Striker Firing Pin

Answer 1

``` A firing pin which is carried inside the bolt and receives its forward momentum from its own spring, when activated by the trigger (squeezed) not struck by the hammer (P7). A squeeze-cocking system is what compresses the firing pin spring. ```

Answer 2

It’s own mass provides the energy. A protrusion machined into the face of the bolt/breech which punctures the primer when the bolt has fully chambered the cartridge. Found in most blowback operated submachine guns (Uzi).

Answer 3

1. A larger mass strikes them (Free Floating) 2. A spring provides their energy ( Inertia, Percussion & Striker) 3. Their own mass provides the energy (Fixed)

Answer 4

Boxer | Berdan

Answer 5

The Boxer has a cup shaped igniting system having the anvil and flash powder built in with one flash hole in the cartridge case.

Answer 6

The Berdan contains only the flash powder, the anvil is part of the cartridge case and has two flash holes. Non-reloadable.

Answer 7

``` Rotating Bolt Rotating Barrel Rising/Lowering Bolt Rising Barrel Roller Locking Block Locking Flaps Swinging Bolt ```

Answer 8

The Bolt Rotates left or right to lock behind the breech

Answer 9

The rear of the bolt rises or lowers into a locking recess of the receiver.

Answer 10

Rollers push out of the left and right sides of the bolt to lock into the breech

Answer 11

The bare rises up into the slide to lock the barrel and slide together. (Also known as “Tilting Barrel” or “Browning”)

Answer 12

Loose plates located on the bolt swing out looking into recesses in the receiver

Answer 13

The rear of the bolt swings out of line with the bore into a locking recess inside the receiver.

Answer 14

A cam that pivots up into a locking recess

Answer 15

``` Bolt Action Blowback Delayed Blowback Recoil Recoil with Gas Assist Gas Operation Manual Pump Revolving Cylinder ```

Answer 16

The operator manually retracts the bolt to eject the spent cartridge and to chamber a new round by pushing the bolt forward

Answer 17

Blowback operated weapons have no locking system. Exploding rounds blowback the cartridge case, forcing the bolt to the rear and cartridge out of the weapon. A new round is chambered as the bolt moves forward.

Answer 18

These weapons have locking systems. There is a delay long enough for the round and excess gases to leave the muzzle before the bolt is fully unlocked.

Answer 19

Recoil works by pressure from the fired round. The Breach 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.

Answer 20

Long Short Inertia

Answer 21

The barrel and bolt recoil all the way back as a complete unit. Once the rearward movement is absorbed by its recoil spring, it unlocks from the bolt and returns to battery. After the bolt compresses the spring, it is held in the rearmost position until the barrel returns to battery. Long recoil systems have a distinct “Double Recoil” feel to them. Used primarily in Browning’s Auto-5 shotgun design.

Answer 22

Short recoil operation differs from long recoil operation in that the barrel and bolt recoil only a short distance before unlocking and “separating.” The barrel stops quickly and the bolt continues rearward, compressing the recoil spring and completing the other cycles of operation. During the last portion of its forward travel, the bolt locks into the barrel and pushes the barrel into battery. Used in most modern day pistols designs (M9, BHP, M1911A1) as well as the M2HB.

Answer 23

The Inertia Action recoil system is the reversal of the other designs (Long, Short). The Inertia system uses nearly the entire firearm as the recoiling component with only the bolt remaining stationary during firing. Once fired, the recoil spring returns to its uncompressed state and pushes the bolt body backwards with sufficient force to cycle the action. The bolt body unlocks, then retracts the bolt head and spent round; ejecting the cartridge, cocking the hammer, and continuing the cycle of operation. Because of this, the operating system is used only in firearms with a heavy recoil (Shotguns; Benelli Super 90)

Answer 24

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. Internal piston taps on the Barrel to assist in Unlocking the Bolt; increasing the rate of fire and reliability.

Answer 25

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.

Answer 26

Gas Blast Gas Tappet Gas Assist

Answer 27

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.

Answer 28

Gas goes down the gas cylinder and makes contact with the gas piston which makes contact with the operating rod or slide. The gas piston and operating rod or slide are separate components.

Answer 29

Gas goes out of the gas port into the gas tube and is carried directly to the bolt or bolt carrier.

Answer 30

Operator is required to pull the slide to the rear, extracting the fired round, and to push the slide forward chambering a new one.

Answer 31

Each round is fired when the trigger is pulled. The cylinder rotates aligning on the next chamber with the barrel so that the next round can be fired.