TC 3-22.240 Medium Machine Gun

Question 1

Describe the M240B

Answer 1

The M240B is a belt-fed, air-cooled, gas-operated, fully automatic machine gun that fires from the open bolt position.

Question 2

What is the sustained rate of fire for the M240B?

Answer 2

100 Rounds per minute fired in 6 to 9 round bursts and 4 to 5 seconds between bursts. Barrel change every 10 minutes.

Question 3

What is the rapid rate of fire for the M240B?

Answer 3

200 rounds per minute fired in 10 to 13 round bursts and 2 to 3 seconds between bursts. Barrel change every 2 minutes.

Question 4

What is the cyclic rate of fire for the M240B?

Answer 4

650 to 950 rounds per minute fired in continuous bursts. Barrel change every minute.

Question 5

What is the maximum range of the M240B?

Answer 5

3725 meters

Question 6

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

Answer 6

1100 meters

Question 7

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

Answer 7

Tripod—1,100 meters
Bipod—800 meters

Question 8

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

Answer 8

Tripod—800 meters
Bipod—600 meters

Question 9

What is the maximum tracer burnout for the M240B?

Answer 9

900 meters

Question 10

What types of ammunition can be used with M240B?

Answer 10

M80– Ball
M61– Armor Piercing
M62– Tracer
M63– Dummy
M82– Blank

Question 11

What are the proper clearing procedures for the M240B?

Answer 11

1) Move the safety to the fire “F” position.
2) With his right hand, (palm up) pulls the cocking handle to the rear, ensuring the bolt is locked to the rear (bipod mode).
3) Return the cocking handle to its forward position.
4) Place the safety on safe “S”.
5) Raise the cover assembly and conduct the four-point safety check for brass, links, or ammunition.

Check the feed pawl assembly under the cover.

Check the feed tray.
Lift the feed tray and inspects the chamber.
Check the space between the face of the bolt and chamber to include the space under the bolt and operating rod assembly. Close the feed tray and cover assembly and place safety to the fire “F” position. Pull cocking handle to the rear, and pull trigger while manually riding the bolt forward. Close the ejection port cover.

Question 12

What are the proper procedures for preforming a function check on the M240B?

Answer 12

1) Places the safety on “F”.
2) Pulls the cocking handle to the rear, locking the bolt to the rear of the receiver.
3) Returns the cocking handle to the forward position.
4) Places the safety on the ”S”, and closes the cover.
5) Pulls the trigger. (Bolt should not go forward).
6) Places the safety on “F”
7) Pulls the cocking handle to the rear, pulls the trigger, and rides the bolt forward.
8) Closes the ejection port cover.