M240B MMG Flashcards
What are the functions of the M240B
- Feeding
- Chambering
- Locking
- Firing
- Unlocking
- Extracting
- Ejecting
- Cocking
What are the ammo types for the M240B?
100-round bandoleers 7lbs each; 2/can Basic allowance 400 rounds - M172 Dummy - M82 Blank - M80 Ball - M62 Tracer (900m burnout) - M61/M993 Armor-piercing
What are the cleaning materials for the M240B?
- Cleaning Lubricant, Protectant (CLP)
- Rifle Bore Cleaner (RBC)
- Dry cleaning solvent
What are the lubricants?
- CLP
- Lubricant, arctic weather (LAW)
- Lubricant, weapon, semi-fluid (LSA)
- Liquid Solvent Agent with Teflon (LSA-T)
How many clicks for a possible defective barrel?
< 2 or > 7
What are the markings on the tripod?
5 mil increments numbered every 100 mils 0 in center 450mil on left side 425mil on right side
What do the clicks equal on the traversing screw?
1 click = 1 mil (100 mils total)
What are the increments for the upper elevating screw?
50 mil increments
0 to +200
0 to -200
When is a barrel change required?
Sustained rate for 10 minutes
Rapid rate for 2 minutes
What is a malfunction?
The gun will fire but fires improperly
What are the two common types of malfunctions?
- Sluggish Operation
- Runaway Gun
What is a stoppage?
Any interruption in the cycle of functioning caused by:
- faulty action of the gun
- defective ammo
What is a hang fire?
When the cartridge primer detonated after being struck by the firing pin but some problem with the propellant powder causes it to burn too slowly and delays the firing of the projectile
What is a 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
When is it a hot barrel?
- More than 200 rounds fired within 2 minutes
- A long continuous burst or repeated firing of the weapon even though 200 rounds were not fired
- if the unit leader decides it so
