Questions and Answers
What is the weight of the M240B?
27.1 pounds
What Field Manual covers the M240B?
TC 3-22.240
Describe the M240B.
The M240B is a gas-operated, belt-fed, air-cooled, fully automatic weapon that fires from the open-bolt position.
What is the sustained rate of fire for the M240B?
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What is the rapid rate of fire for the M240B?
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What is the cyclic rate of fire for the M240B?
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What is the maximum range of the M240B?
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What is the maximum effective area of the M240B with tripod?
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What is the maximum effective range of the M240B for a point target?
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What is the tracer burnout for the M240B?
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What types of ammunition can be used with the M240B? (Select all that apply)
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What are the proper clearing procedures for the M240B?
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What are the proper procedures for performing a function check on the M240B?
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What is the name of the 240's tripod?
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What is meant by traversing fire?
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What is meant by searching fire?
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What is meant by grazing fire?
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What is meant by plunging fire?
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What is meant by oblique fire?
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What is meant by enfilade fire?
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What are the 8 major groups of the M240?
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What are the 4 rules of firearm safety? (Select all that apply)
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Does the M240B have an Amber Status?
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Describe the Green status for the M240B.
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Describe the Red status for the M240B.
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Describe the Black status for the M240B.
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The phases of the cycle of function in order are: _____
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What are the CYCLE OF FUNCTION?
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What is COOLING?
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Study Notes
M240B Overview
- Weight of the M240B is 27.1 pounds.
- Current Field Manual is TC 3-22.240, published on April 28, 2017.
M240B Characteristics
- Gas-operated, belt-fed, air-cooled, fully automatic weapon.
- Fires from the open-bolt position and supports optics and equipment through standardized mounting surfaces.
Rates of Fire
- Sustained rate: 100 rounds per minute in bursts of 6 to 9 rounds; barrel change every 10 minutes.
- Rapid rate: 200 rounds per minute in bursts of 10 to 13 rounds; barrel change every 2 minutes.
- Cyclic rate: 650 to 950 rounds per minute in continuous bursts; barrel change every minute.
Ranges and Ammunition
- Maximum range: 3725 meters.
- Maximum effective area (with tripod): 1800 meters.
- Maximum effective range for point target: 800 meters.
- Tracer burnout distance: 900 meters.
- Compatible ammunition types: M80 (Ball), M61 (Armor Piercing), M62 (Tracer), M63 (Dummy), M82 (Blank).
Clearing and Function Check Procedures
- Proper clearing involves placing the weapon in fire position, conducting checks for ammunition, inspecting the chamber and parts, and ensuring the weapon is safe before pulling the trigger.
- Function check requires ensuring safety positions, testing trigger response, and confirming bolt functionality.
Tripod and Fire Types
- M240B is mounted on the M122A1 tripod.
- Fire types include:
- Traversing fire: adjusting left and right.
- Searching fire: adjusting up and down.
- Grazing fire: fire cone stays under 1 meter off the ground.
- Plunging fire: firing from high to low ground.
- Oblique fire: angled fire relative to the target.
- Enfilade fire: long axis of beaten zone aligned with the target.
Major Groups of the M240B
- The M240B consists of eight major components:
- Barrel assembly
- Cover assembly
- Butt stock assembly
- Receiver assembly
- Trigger assembly
- Operating rod assembly
- Bolt assembly
- Driving spring rod assembly
Firearm Safety Rules
- Treat every weapon as if it is loaded.
- Never point the weapon at anything you do not intend to destroy.
- Keep your finger off the trigger until ready to fire.
- Ensure positive identification of the target and its surroundings.
Status Indicators
- Amber status: The M240 does not have an amber status.
- Green status: Bolt locked forward, fire selector on fire, feed tray closed.
- Red status: Ammunition loaded, bolt open and locked rear, fire selector on safe.
- Black status: Ammunition loaded, bolt locked rear, selector on fire, finger on trigger ready to engage.
Cycle of Function
- Phases include feeding, chambering, locking, firing, unlocking, extracting, ejecting, and cocking.
- Cycle of function describes the mechanical processes during weapon operation.
Cooling
- Cooling refers to the dissipation of heat from the weapon during firing to maintain operational efficiency.
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Description
Test your knowledge on the M240B machine gun with this quiz based on TC 3-22.240. Learn about its weight, field manual, and technical specifications. Perfect for military personnel or defense enthusiasts looking to reinforce their understanding of this weapon system.