M2A1 .50 Cal

Question 1

Weights of the M2A1

Answer 1

Receiver - 60lbs
Barrel - 24lbs
M3 Tripod - 44lbs
Total gun with tripod - 128lbs

Question 2

Max Range

Answer 2

7400 Yards

Question 3

Max Area Target

Answer 3

2000 yards

Question 4

Max point target

Answer 4

1500 yards

Question 5

Grazing fire

Answer 5

700 yards

Question 6

Grazing fire

Answer 6

700 yards

Question 7

Sustained rate of fire

Answer 7

Less than 40rpm
6-9 round burst
10-15 second intervals
Barrel change at end of firing day or if damaged

Question 8

Rapid rate of fire

Answer 8

More than 40rpm
6-9 round burst
5-10 second intervals
Barrel change every hour

Question 9

Cyclic rate of fire

Answer 9

450-600rpm
Long continuous burst
Barrel change every 200 rounds

Question 10

Condition 4

Answer 10

Bolt forward
Chamber empty
No rounds on feed tray
Cover closed
Weapon on safe & single

Question 11

Condition 3

Answer 11

Bolt forward
Chamber empty
First round engaged by belt holding pawl
Cover closed
Weapon on safe & single

Question 12

Condition 2

Answer 12

Bolt forward
Chamber empty
Rounds on feed tray
First round against cartridge
Stop grasped by extractor
Cover closed
Weapon on safe & single
(Half load)

Question 13

Condition 1

Answer 13

Bolt forward
Round in chamber
Rounds on feed tray
Cover closed
Weapon on safe & single fire
(Full load)

Question 14

General characteristics

Answer 14

Belt fed
Recoil operated
Air cooled
Crew served

Question 15

Major Assemblies

Answer 15

Barrel assembly
Back plate assembly
Bolt assembly
Driving spring rod assembly
Barrel buffer assembly
Barrel extension assembly
retracting slide handle
Rear sight assembly
Cover assembly
Receiver assembly

Question 16

Authorized cleaning materials

Answer 16

CLP (Clean Lube Preserve)
RBC (Rifle bore cleaner)
Dry cleaning solvent
Soapy water

Question 17

Authorized Lubricants

Answer 17

CLP (Clean Lube Preserve)
LSA (Lube semi fluid auto wpn Teflon)
PL-M (Preserve lube medium weight)
LAW (lube arctic weather) ( under -10°)

Question 18

Cycle of Operations

Answer 18

Firing
Unlocking
Extracting
Ejecting
Cocking
Feeding
Chambering
Locking

Question 19

Remedy a runaway gun

Answer 19

• If less than 25 rounds, let run
• If more than 25 rounds, pull round off belt
• in emergency, twist belt and jam gun
  (Run it, rip it, or twist it)

Question 20

Immediate action

Answer 20

-“MISFIRE”
- “5, 4, 3, 2, 1” for hangfire
- pull bolt to rear check for ejecting
- send bolt home check for feeding

Question 21

Remedial Action

Answer 21

PPAD
- Place weapon on safe
- pull charging handle to rear
- assume live round in chamber
- determine if hot barrel
(If/once barrel is cold, start cold barrel procedure)

Question 22

Determine if barrel is hot or cold

Answer 22

Hot - more than 200 rounds in 2 min
Cold - less than 200 rounds in 2 min

Question 23

Fail to fire after remedial action

Answer 23

• Clear the Weapon
• Inspect weapon for broken/burred part
• Turn in to a higher echelon of maintenance

Question 24

ADDRAC

Answer 24

• Alert
• Direction
• Description
• Range
• Assignment
• Control

Question 25

8 Principles of Machine Gun deployment

Answer 25

• Pairs (employed in pairs)
• Interlocking fire
• Coordination of fire
• Mutual support
• Defilade (Position Defilade)
• Enfilade (Produce enfilade fire)
• Economy
• Protection (cover and concealment)

Question 26

Rounds

Answer 26

M33 ball - personnel, light material
M17 tracer - brown tip, 900m burnout
M8 armor piercing incendiary - yup
M20 API tracer - aluminum ring, red tip
M1a1 blank -
M2 dummy
M903 SABO light armor penetrating - light vehicle and aircraft (SLAP)

Question 27

Cold barrel procedures

Answer 27

CCC
CLEAR weapon
CHECK weapon
CHECK ammo