M240B- Machine Gun

Question 1

What Field Manual covers the M240B?

Answer 1

FM 3-22.68 Chapter 3

Question 2

What are some characteristics that describe the M240B?

Answer 2

• It mounts on a bipod, tripod, aircraft, or vehicle
• Belt-fed
• Air-cooled
• Gas-operated
• Fully automatic machine gun

Question 3

What is the sustained rate of fire for the M240B?

Answer 3

(a) 100 Rounds per minute fired in 6 - 9 round bursts
(b) 4 - 5 seconds apart
(c) Barrel change every 10 minutes

Question 4

What is the rapid rate of fire for the M240B?

Answer 4

(a) 200 rounds per min fired in 10 -13 round bursts
(b) 2 - 3 seconds apart
(c) Barrel change every 2 minutes

Question 5

What is the cyclic rate of fire for the M240B?

Answer 5

• 650 to 950 rpm continuous bursts

- Barrel change every minute

Question 6

What is the maximum range of the M240B?

Answer 6

3725 meters

Question 7

What is the maximum effective range of the M240B with tripod and T&E?

Answer 7

1100 meters

Question 8

What is the maximum effective range of the M240B for an area target?

Answer 8

Tripod – 1800 meters

Bipod – 800 meters

Question 9

What is the maximum effective range of the M240B for a point target?

Answer 9

Tripod – 800 meters

Bipod – 600 meters

Question 10

What is maximum distance to lay suppressive fire?

Answer 10

1800 meters

Question 11

What is the length of the M240B?

Answer 11

49 inches

Question 12

What is the weight of the M240B?

Answer 12

Approximately 27.6 pounds

Question 13

What is the maximum tracer burnout for the M240B?

Answer 13

900 Meters

Question 14

What types of ammunition can be used with M240B?

Answer 14

• 7.62 mm:
• Ball (M80)
• Armor Piercing (M61)

Question 15

What are the three (3) Immediate actions for uncontrolled fire?

Answer 15

(1) Gunner holds weapon on target & fires the remaining ammunition
(2) The assistant gunner stops the weapon from firing by breaking the belt of ammunition
(3) The gunner as a last resort pulls the cocking handle to the rear thus, locking the bolt to the rear of the receiver

Question 16

What is a misfire?

Answer 16

Failure of a chambered round to fire which can be due to an ammunition defect or faulty firing mechanism

Question 17

What is a cook off?

Answer 17

Firing of a round due to heat of a hot barrel & not to the firing mechanism

-A hot weapon (200 or more consecutive rounds just fired) can “cook off” a round without any action from the firer