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M240B USMC Knowledge Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What is the primary role of the M240B in the Marine Corps?✔✔To provide sustained, accurate automatic fire in support of infantry and vehicle operations.
What type of weapon is the M240B classified as?✔✔A belt-fed, air-cooled, gas-operated medium machine gun.
What caliber round does the M240B fire?✔✔7.62x51mm NATO.
How is the M240B typically fed during operation?✔✔With disintegrating metallic link belts.
What is the maximum effective range of the M240B on a point target with a tripod?✔✔800 meters.
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What is the maximum effective range of the M240B on an area target with a tripod?✔✔1,800 meters.
What is the cyclic rate of fire for the M240B?✔✔650 to 950 rounds per minute, depending on the gas regulator setting.
Why is it important to control the rate of fire on the M240B?✔✔To prevent overheating and maintain barrel integrity.
What is the sustained rate of fire for the M240B?✔✔100 rounds per minute, fired in 6- to 8-round bursts.
How often should the barrel be changed during sustained fire?✔✔Every 10 minutes during sustained fire.
What does headspace and timing ensure in the M240B?✔✔Safe and effective function of the bolt and firing pin mechanisms.
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