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Questions and Answers
A machine gun (MG) section is positioned to provide supporting fires for an advancing infantry unit. Under what circumstance would the MG section be required to displace due to its firing position?
A machine gun (MG) section is positioned to provide supporting fires for an advancing infantry unit. Under what circumstance would the MG section be required to displace due to its firing position?
- When the MG section expends 50% of its ammunition.
- When directed by higher command.
- When the infantry unit advances beyond 500 meters of the MG position.
- When the MG fire trajectory is obstructed by the advancing infantry unit. (correct)
During defensive operations, what primary missions are typically assigned to a machine gun (MG) team?
During defensive operations, what primary missions are typically assigned to a machine gun (MG) team?
- Point Target Indication and Harassment
- Area Denial and Flank Security
- Reconnaissance by Fire and Interdiction
- Principal Direction of Fire and Final Protective Line (correct)
An M240B machine gun team is engaging a target. They fire several bursts, and pause briefly between each burst to manage heat and maintain effective fire. According to the rates of fire, what is the approximate sustained rate of fire for the M240B, considering barrel changes?
An M240B machine gun team is engaging a target. They fire several bursts, and pause briefly between each burst to manage heat and maintain effective fire. According to the rates of fire, what is the approximate sustained rate of fire for the M240B, considering barrel changes?
- 200 rounds per minute, changing the barrel every 2 minutes.
- 100 rounds per minute, changing the barrel every 10 minutes. (correct)
- 450-600 rounds per minute, changing the barrel every 30 minutes.
- 40 rounds per minute, changing the barrel every hour.
A machine gun team receives the fire command: 'Attack, Detection, Description, Range, Assignment, Control'. What is the primary purpose of using the AADRAC format?
A machine gun team receives the fire command: 'Attack, Detection, Description, Range, Assignment, Control'. What is the primary purpose of using the AADRAC format?
During a tactical movement, a machine gun unit needs to displace from its current position to a new location while maintaining continuous fire support. Which method of displacement involves elements of the unit moving separately, allowing for overlapping fire and a more gradual shift in position?
During a tactical movement, a machine gun unit needs to displace from its current position to a new location while maintaining continuous fire support. Which method of displacement involves elements of the unit moving separately, allowing for overlapping fire and a more gradual shift in position?
Flashcards
SBF Displacement Criteria
SBF Displacement Criteria
Fires of a supporting unit are blocked by the supported unit.
Economy of Rounds
Economy of Rounds
Using the right amount of ammo to maximize effect and reduce waste.
AADRAC
AADRAC
Attack, Detection, Description, Range, Assignment, and Control. It's a fire command.
Methods of Displacement
Methods of Displacement
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MG Defensive Missions
MG Defensive Missions
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Study Notes
- An SBF position could be displaced by supporting fires masked by a supporting unit
- The MG employment principle that covers ammunition consumption and the amount required to maximize the effects of fire and minimize excessive consumption is economy of rounds
AADRAC
- Stands for Alert, Direction, Description, Range, Assignment, Control
- AADRAC is a kind of fire command
MORT
- Stands for Method, Objective, Route, Time
- MORT represents the displacement criteria
Displacement Criteria
- Echelon and Unit can be methods of displacement
Employment In Offense
- By section is the preferred method of employment in the offense
Missions Assigned to MG in Defense
- FPL
Characteristics include
- Trajectory
- Burst of fire
- Cone of Fire
- Beaten Zone
- Dead Space
- Danger Space
M240B Rates of Fire
- Sustained: 100 RPM, 6-8 round burst, 4-5 second pause, barrel change every 10 minutes
- Rapid: 200 RPM, 6-8 round burst, 2-3 second pause, barrel change every 2 minutes
- Cyclic: 550-650 RPM, barrel change every 1 minute
M2A1 Rates of Fire
- Sustained: 40 rounds or less per minute, 6-9 round burst, 10-15 second pause, barrel change end of the day
- Rapid: 40 rounds or more per minute, 6-9 round burst, 5-10 second pause, barrel change every hour
- Cyclic: 450-600 RPM, barrel change every 30 minutes
MK19 Rates of Fire
- 40 RPM, 6-9 round burst, 10-15 second pause
- Rapid 60 RPM, 6-9 round burst, 8-10 second pause
- Cyclic 325-375 RPM
Classes of Fire
- Ground: Grazing & Plunging
- Target: Frontal, Flanking, Oblique, Enfilade
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Description
This lesson covers key principles of machine gun employment, including displacement criteria (MORT), fire commands (AADRAC), and rates of fire for the M240B. It also discusses employment in offensive and defensive situations, highlighting critical characteristics such as trajectory and beaten zone.
