M240B Flashcards
Weight of barrel…
6.6 pounds
Weight of machine gun…
27.1 pounds
Weitht of spare barrel case, complete w/ spare barrel and all SL-3 components….
12.9 pounds
Weight of tripod with T&E mechanism..
12.8 pounds
Length of machine gun…
49 inches
Height of machine gun on tripod….
17.5 inches
Maximum range…
3,725 meters
Maximum effective range (with the M122 tripod)
1,800 meters
Grazing fire
600 meters
Tracer burnout (approximate)
900 meters
Sustained rate of fire
100 RDS/M 6-8 rd burst (4-5 seconds pause between burst) -Change barrel every 10 minutes
Rapid rate of fire
200 RDS/M 10-12 rd burst (2-3 seconds pause between burst) -Change barrel every 2 minutes
Cyclic rate of fire
550 to 650 RDS/M continuous burst -Change barrel every 1 minute
Muzzle velocity
2,800 feet per second
Rifling
Four grooves with a uniform right hand twist, one turn in 12 inches
Condition 4
The bolt is forward, the safety is OFF and the feed tray is clear of ammunition. The chamber is empty and the cover is closed.
Condition 3
The bolt is forward. The chamber is empty and the safety is OFF. The cover is closed. The source of ammunition is on the feed tray open link down.
Condition 2
Does not apply to the M240B
Condition 1
The bolt is locked to the rear. The safety is on. Rounds are positioned in the feed tray open link down first round in the feed tray groove. Cover is closed.
Authorized Cleaning Materials
CLP, RBC, dry cleaning solvent, and hot soapy water.
Authorized Lubricants
CLP, LSA, LSA-T, and LAW
Immediate action
MISFIRE!!! (X3) 5,4,3,2,1 Pull the bolt to the rear observing for feeding and ejecting.
Hang fire
A round that goes off some time after the firing pin strikes the primer due to a slow burning propellant
Cook-off
When the heat of the barrel is high enough to cause the propellant powder inside the round to ignite even though the primer is not struck.
