12.7 mm AAMG Quiz

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Questions and Answers

What adjustment is made to the gun ports in extreme cold weather?

Set at 4 mm (correct)

Set at 3 mm

Set at 5 mm

Set at 6 mm

What is the primary function of the Bolt Assembly?

Aiming at targets

Transporting cartridges

Loading and locking (correct)

Firing and ejecting

What is the main role of the Feed Mechanism?

To aim at targets

To eject spent cartridges

To fire the machine gun

To move cartridges to the feeding position (correct)

What is the fixed traverse elevation (TE) of the weapon?

9.2 mils Signup and view all the answers

What is the purpose of the Sighting Mechanism?

To enable aiming at targets Signup and view all the answers

What components are included in the AA Sighting Equipment?

Front and rear AA sights, course sight, and mid-base Signup and view all the answers

At what distance should an object be aligned with the AA sight for proper targeting?

900 metres Signup and view all the answers

Which mechanism is responsible for placing the first cartridge to be fired?

Loading Mechanism Signup and view all the answers

Where should the short feed arm be placed during assembly?

Into the feed arm notch from the same side as the bolt slide Signup and view all the answers

What should be done after tightening the nut and inserting the split pin?

Engage the feed mechanism base and cover on the receiver Signup and view all the answers

How should the trigger mechanism frame be replaced?

By holding the connecting lugs and pushing the keys into the grooves Signup and view all the answers

What is the purpose of the sear spring in normal conditions?

To force the sear up Signup and view all the answers

What must be done with the rear sight leaf after replacing the back plate group?

Lay it down Signup and view all the answers

During the loading process, what ensures the first round is held in place?

The belt holding pawl Signup and view all the answers

What effect does pulling the loading handle have on the bolt slide?

It drives the bolt slide to move backward Signup and view all the answers

What is the function of the trunnion locking bolts after assembling the gun?

To secure the parts in their proper positions Signup and view all the answers

What is the first step in removing the gas regulator?

Pull out the split pin Signup and view all the answers

How should the gas regulator be aligned when replacing it?

With the marking line aligned to the setting line Signup and view all the answers

What should be done immediately after engaging the wrench on the piston lever?

Wrench off the bolt slide Signup and view all the answers

What sequence should be followed for the assembly of the components?

Assembly is carried out in the reverse order of disassembly Signup and view all the answers

How should the firing pin head be positioned when replacing it?

With the even face upward Signup and view all the answers

What is the function of the split pin after replacing the gas regulator?

To secure the gas regulator Signup and view all the answers

What is the first component that is removed when disassembling the barrel?

The locking bolt nut Signup and view all the answers

What is one primary reason for disassembling the machine gun?

For cleaning and lubrication purposes Signup and view all the answers

What must be aligned when replacing the barrel?

The rear end of the barrel and the receiver Signup and view all the answers

What should be the first step when removing the back plate group?

Fix the gun body in level position Signup and view all the answers

Which component must be removed after pulling out the split pin?

The feed mechanism Signup and view all the answers

How should the rear part of the receiver be handled while removing the bolt assembly?

Press down slightly while pulling the cocking handle backward Signup and view all the answers

What is essential to do after separating the bolt body from the bolt slide?

Remove the extractor along with its spring Signup and view all the answers

What direction should the feed mechanism cover be turned to remove the coned axle of the short feed arm?

Upside down Signup and view all the answers

When removing the trigger mechanism frame, which part should be held to ensure safe removal?

The connecting lugs on the frame Signup and view all the answers

What tool should be used to unscrew the trunnion locking nuts during the disassembly process?

An adjustable wrench Signup and view all the answers

What must be considered when determining the type of air threat?

The type and number of aircraft expected to attack Signup and view all the answers

What is essential for ensuring good site selection for an AAMG?

Availability of a level platform for stability Signup and view all the answers

Which factor is NOT considered important when planning air defense design?

Personal preferences of the command structure Signup and view all the answers

What must a defender do to ensure an effective deployment pattern?

Adapt the deployment pattern according to the situation Signup and view all the answers

Why is good camouflage important for an AAMG site?

It helps in blending with the surroundings to avoid detection Signup and view all the answers

What is the maximum allowable horizontal movement correction indicated by the front sight of a 12.7 AAMG?

45 cm both left and right Signup and view all the answers

How does vertical allowable correction differ from horizontal allowable correction?

Vertical allowable correction allows for adjustments both up and down Signup and view all the answers

What might limit the number of weapons available for a particular formation or unit?

The number of weapons available within the formation Signup and view all the answers

What happens when the camming shoulders of the firing pin are out of the locks?

They close under the action of the shaped groove. Signup and view all the answers

What is the role of the return spring during the bolt slide's rearward movement?

To gradually press down as the bolt slide moves back. Signup and view all the answers

What occurs when the trigger plate is pulled?

The sear is lifted out of the sear groove. Signup and view all the answers

Which component directly feeds the first round into the chamber?

Feed pawl Signup and view all the answers

What function does the limiting mechanism serve in relation to the long feed arm?

It stops the long feed arm at its front position. Signup and view all the answers

How is the bolt body maneuvered during the operation of the bolt slide?

It is carried backward by the slide. Signup and view all the answers

What action occurs just after the bolt slide moves rearward and the sear groove is locked?

The bolt assembly remains in the rear position. Signup and view all the answers

In the process of firing, what does the cocking handle do during forward movement?

Moves the belt feed slide to the left. Signup and view all the answers

Study Notes

12.7 mm AAMG

Used against low-flying aerial targets (aircraft, parachutists), and ground targets (armored cars, infantry, strongpoints)
Muzzle Velocity: 840 meters per second
Effective Firing Ranges:
- Aircraft: 1600 meters
- Armored Targets: 800 meters
- Strongpoints: 1500 meters
- Enemy Infantry: 3300 meters
Maximum Flight Distance for Bullet: 7000 meters at 45-degree angle of fire
Effective Firing Height: 1000 meters
Cartridge Types: Armour Piercing Incendiary (API), Armour Piercing Incendiary Tracer (APIT)
Armour Penetration:
- Steel: 20 mm at 100 meters
- Brick Wall: 250 mm at 100 meters
Rate of Fire: 560-600 rounds per minute
Ammunition Capacity: 70 rounds with linked belt
Structure:
- Caliber: 12.7
- Rifling: Right-hand
- Traverse: 360 degrees
- Elevation: 30-80 degrees
Weight:
- Total: 84 kg
- Gun Body: 34 kg
- Gun Mount: 17 kg
- Support: 33 kg
- Anti-Aircraft Sighting Equipment: 4 kg
- Shoulder Stock: 3 kg
- Ammunition Box: 13.62 kg (with 70 rounds and linked belt)
Barrel Assembly
Receiver
Bolt Assembly
Feed Mechanism
Trigger Mechanism

Barrel Assembly

Muzzle Brake and Gas Regulator
- Reduces recoil.
- Regulates gas volume (three diameters: 3 mm, 3.5 mm, 4 mm).
- 3.5 mm is usual setting.
- 4 mm for extreme cold, 3 mm for extreme heat.

Bolt Assembly

Used for loading, locking, firing, extracting, and ejecting.
Composed of bolt slide and bolt body

Feed Mechanism

Moves cartridges to the firing position.

Trigger Mechanism

Works with bolt assembly, assists firing

Gun Mount

Sighting Mechanism: Enables aiming at targets within traversing and elevating limits

Locking Mechanism (Elevation & Traverse)

Used to fix the gun body in elevation and traverse when ground sight is used.

Loading Mechanism

Positions the first cartridge for firing - by pulling the bolt slide back wards.

AA Sighting Equipment

Consists of:
- Front and Rear AA sights
- Course sight
- Connecting rod
- Mid - base
- Ruler for computing range and foreshortening
Rear sight leaf inclines to the left approximately 2°33' for automatic modification of the constant deviation at different ranges.

Stripping

Cleaning, lubrication, inspection, and correction of malfunctions.
- Methods for removing components (back plate, trigger mechanism, feed mechanism, bolt assembly, gas regulator, barrel.) This sections lists steps to disassemble and reassemble the machine gun.

Removing the Barrel

Removing the locking bolt nut
Pulling the locking bolt
Removing the barrel

Assembling

Carrying out steps in reverse order of disassembly
Replacing the barrel, gas regulator, bolt assembly, firing pin head and extractor.
Replacing the feed mechanism

Mechanical Function of Gun Body

Bolt assembly position, return spring, sear spring, and limiting mechanism.

Ammunition

API: Armour Piercing Incendiary ammunition, steel casing, incendiary agent, steel core, lead jacket, used to destroy aircraft and fire light armored targets.
APIT: Armour Piercing Incendiary Tracer, similar to API but includes tracer agent within cartridge

GEN DUTIES

Detachment consists of four men
- One in command (tactical control, target recognition, computing ruler operation)
- Two for line, elevation, and firing number
- One for course operations and loading
- Ammunition supply

Responsibilities of Number 1

Tactical handling, detachment discipline, and efficiency

Minimum Detachment Drill

Employment

Factors Affecting Air Defence Design (by AAMG)

Air Threat
Terrain
Characteristics of Defended Area
Economy of Resources

Planning of Air Defence Design

Type and number of aircraft
Weapons
Vulnerable points to defend

Considerations for Siting an AAMG

All-round clear field of fire (primary arc restriction).
Maximum depression for hills/cliffs.
Level Platform.
Camouflage possibilities
Wireless Communication (if needed)
Suitable for ground attacks

Zeroing

Firing 8 rounds with same aim.
Zeroed if 6 of 8 rounds hit within circle and MPI (near or in white patch).
Measurement of correction in cm, at 100 meters distance, for horizontal and vertical movements of the front sight.
21 rings/threads for vertical screw adjustments.

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Description

Test your knowledge on the 12.7 mm AAMG's specifications, effective ranges, and ammunition types. This quiz covers various aspects including muzzle velocity, armor penetration, and firing capabilities. Perfect for enthusiasts of military equipment and ballistics.