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MACHINE GUN, 50 CAL, HB, M2 BROWNING AUTOMATIC
REFERENCES: Field Manual 23-65, Technical Manual 9-1005-213-10
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1. What is the description of the .50 Cal, HB, M2 Machine Gun?
The .50 Cal, HB, M2 Machine Gun is a belt-tied, recoil operated, air cooled, crew served machine gun, capable of firing single shot as well as automatic fire, and operates on the short recoil principle
2. What is the .50 Cal Machine Gun used for?
-Support the infantryman in both the attack and defense
-To provide protection for motor movements, vehicle parks, and train bivouacs
-To defend against low flying hostile aircraft
-To destroy lightly armored vehicles
-Reconnaissance by fire on suspected enemy positions
3. What is the total weight of the M2 completely mounted on the M3 tripod?
128 lbs. (approximately)
4. What is the weight of the M2 Machine gun?
84 lbs.
5. What is the weight of the receiver group?
60 lbs
6. What is the weight of the barrel?
24 lbs. (approximately)
7. What is the maximum range of the .50 Cal (firing the M2 Ball)?
6,764 meters
7a. What is the maximum effective range of the .50 Cal?
1,830 meters (area shot)
1,500 meters (single shot)
8. What is the length of the .50 Cal, overall?
65 inches (approximately)
9. What is the length of the barrel of the .50 Cal?
45 inches
10. What is the muzzle velocity of the .50 Cal?
3,050 ft per sec. (2,080 MPH)
11. What is the sustained rate of fire of the .50 Cal?
40 rounds or less per minute
12. What is the rapid rate of fire of the .50 Cal?
More than 40 rounds per minute
13. What is the cyclic rate of fire of the .50 Cal?
450 - 550 rounds per minute
14. What are the common stoppages of the .50 Cal?
-Failure to feed
-Failure to chamber
-Failure to lock
-Failure to fire
-Failure to unlock
-Failure to extract
-Failure to eject
-Failure to cock
15. What type of front sight does the .50 Cal have?
A semi-fixed blade type with cover
16. What are the ten major components and assemblies of the .50 Cal?
-Barrel Group
-Carrier Assembly
-Backplate Group
-Receiver Group
-Bolt Group
-Cover Group
-Bolt Stud
-Barrel Extension Group
-Barrel Buffer Body
-Driving Spring Rod Assembly
17. When should the head space on the .50 Cal machine gun be checked?
-Before firing
-After the gun is assembled
-After replacing the barrel or receiver group
-When there is doubt that correct head space is set
18. Head space adjustments on the .50 Cal machine gun is correct when what conditions are met?
-The recoiling groups are fully forward
-There is no independent rear ward movement between the bolt, barrel, and barrel extension
-The no-go gauge does not fit in the T-slot, and the firing gauge does fit
19. What is the importance of current head space adjustment on the .50 Cal machine gun?
Improper head space adjustment can cause improper functioning of the gun and, frequently, damage to parts and/or injury to personnel
20. Timing on the .50 Cal machine gun is correct when what conditions are met?
-Firing takes place when the recoiling parts are in the correct position for firing (between .020 and .116 inch out of battery)
-When the gun fires on the Fire gage, and does not fire of the No Fire gage.
(Timing must be checked and/or set each time head space is set, or whenever timing is questionable)
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HAND GRENADES
REFERENCE: Field Manual 23-30
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1. What is a hand grenade?
A hand grenade is a small, hand-held, short range, indirect fire weapon that is designed for projection to a target by means of throwing
2. In what five (5) areas can the hand grenade assist the individual soldier in the accomplishment of the mission?
-Producing casualties
-Signaling
-Screening
-Producing incendiary effects
-Riot control
3. What are the three (3) characteristics of all hand grenades?
-Employment range is short
-Small effective casualty radius
-Delay element permits safe throwing
4. What are the four (4) general types of hand grenades?
-Fragmentation - time delay and impact M68; grenades to inflect casualties
-Chemical/Smoke - canister type grenades used for signaling, screening, or CBR
-Riot Control - bursting type grenades or burning type grenades used for control of unruly crowds
-Special Purpose - grenades used for specific results:
Incendiary - Used to destroy by heat
Concussion - Used for destruction by shock wave
Practice - Used for training
5. What types of grenades should every soldier be able to identify (according to the soldiers manual of common tasks)?
-M67 Fragmentation
-M18 Colored Smoke
-M34 WP Smoke
-AN-M8 HC Smoke
-AN-M14 TH3 Incendiary
-ABC-M2A2 CS Riot Control
6. What are the components of a hand grenade?
-Body
-Filler
-Fuze
-Safety Clip
7. What is the effective casualty-producing radius of the M67 hand grenade?
15 meters
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GRENADE LAUNCHER, 40 MM, M203
REFERENCES: Field Manual 23-31, Technical Manual 9-1010-221-10
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1. What is the description of the M203 Grenade Launcher?
The M203 Grenade Launcher is a light weight, breech loaded, pump action, sliding barrel, single shot, shoulder fired weapon attached to the M161/2 Rifle
2. What is the weight of the M203?
-3.0 lbs. unattached
-3.5 lbs. loaded
-11.5 lbs. (approx) loaded including the M16 or M16Al
3. What is the maximum effective range of the M203?
-Area Target: 350 meters
-Point Target: 150 meters
4. What is the maximum range of the M203?
400 meters
5. What type of ammunition does the M203 use?
The ammunition used in the M203 is a 40 MM (caliber) fixed type weighing 8 ounces with an approximate a diameter of 1.5 inches
6. What are the five (5) major components that make up the M203 Grenade Launcher?
-Quadrant Sight Assembly
-Barrel Assembly
-Receiver Assembly
-Handguard
-Leaf Sight Assembly
7. What three (3) assemblies are you authorized to remove in disassembly of the M203 weapon?
-Quadrant Sight Assembly
-Barrel Assembly
-Handguard
8. How must you maintain the M203 Grenade Launcher in varying climates?
-Normal: keep weapon cleaned and oiled at all times using light coats of CLP
-Temperatures blow freezing: keep weapon free of moisture and lubricate with CLP
-Sandy or dusty air: clean daily, keep free of dirt and sand, and lubricate frequently with CLP, removing excess CLP with a rag
-Damp or salty air: clean daily, keep free of dirt and sand, and lubricate frequently
9. How do you clear the M203 and put it on safe?
-Push in the release button, pull the barrel forward
-Watch to see if a round extracts
-Place safety on safe
-Inspect the breach to ensure that a round is not present
-Pull the barrel to the rear until it clicks (this cocks the weapon)
-Place the safety on fire
10. How do you load the M203?
-Press the barrel latch and slide barrel forward
-Place safety on safe
-Insert 40mm clean, dry indented ammunition into the chamber
-Slide the barrel rearward until it locks with an audible click
11. How do you unload the M203?
-Depress barrel latch and move the barrel forward.
-The cartridge case should automatically eject, if not, tap it with a cleaning rod to remove it
-Place the weapon on safe
-Slide the barrel rearward, locking it into the breech
12. What are the steps for immediate action for the M203?
-Keep the weapon pointed downrange
-Shout "Misfire" (during training only)
-Wait 30 seconds with weapon pointed at target
-determine the cause of the malfunction:
-If the primer is dented, separate the round from other ammunition, the round is defective. Reload and re-fire
-If the primer is not dented, the firing mechanism is at fault. Reload and re-fire only after the problem has been identified and corrected
13. What types of ammunition can be fired from the M203?
-Practice
-High Explosive
-High Explosive Dual Purpose
-Tactical Chemical Smoke
-Star Parachute
-Ground Marker
-Star Cluster
14. What are the six (6) common malfunctions of the M203 and
corrective actions for each?
-Failure to cock: Turn in to armorer
-Failure to fire: Place on fire, load, reload, hand cycle, clean, turn in to armorer
-Failure to lock: Turn in to armorer
-Failure to chamber: Reload, Clean the weapon
-Failure to extract: Tap out with cleaning rod
-Failure to eject: Turn in to armorer
-Safety fails to stay in position: Turn in to armorer
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MINES/ANTIPERSONNEL MINE M18A1 (CLAYMORE)
REFERENCES: Field Manual 20-32, Field Manual 23-23)
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1. What is a land mine?
A land mine is a weapon, an explosive or other substance (normally encased) used to kill, wound or somehow harm personnel, or to damage or destroy vehicles, boats, or aircraft. Alone they are a weak weapon, with men and other weapons, they are a strong defense
2. What is meant by breaching a mine field?
-Breaching a mine field is the use of any means to make a passage through the mined area
-An Assault Mine Field Breach is a combat breach of an enemy mine field covered by enemy fire
3. What is meant by countermine?
Countermine is the operations, tactics, and techniques used to find, avoid, or neutralize enemy mines, and the use of resources to keep the enemy from using mines against our forces
4. How can a mine be detonated?
-By action of the victim
-By passage of time
-By controlled means
-By preset timers
5. What is mine warfare?
Mine warfare is the strategic or tactical use of mines and their countermeasures
6. What are the five (5) parts of a mine?
-Fuse
-Detonator
-Booster or Activator (with some exceptions)
-Main Charge
-Body or Case
8. What are the four (4) main types of fuses used in mines?
-Mechanical: A spring drives a striker against a percussion cap which fires the detonator
-Chemical: A small container of acid is broken by the initiating action; the acid dissolves a restraining wire freeing the striker to fire the detonator
-Friction: The initiating action that ignites substances inside the fuse by friction; the flame fires the detonator
-Electrical: The initiating action closes an electrical circuit which detonates an electrical detonator
9. Name four (4) types of mines.
Service, Phony, Training, and Improvised
10. What are the colors of mines and what do they indicate?
Olive Drab: High Explosives (HE)
Gray: Chemical Mines (sometimes with a colored banded to indicate agent)
Light Red: Incendiary burst
Blue: Practice mines
Blue with the word INERT: Inert mines
11. What is the Claymore mine effective against?
Massed infantry attacks and light vehicles
12. What is the optimum effective range of the Claymore mine?
50 meters
13. What are the components of the Claymore mine?
-M40 test set
-M4 electric blasting cap with wire
-M57 firing device
-M7 bandoleer
-M18A1 claymore mine
-Insulation tape
-Instruction sheet
14. How far from the detonation is the Claymore mine considered dangerous?
250 meters
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LAUNCHER AND CARTRIDGE, 84MM, M136 (AT4) HEAT
REFERENCE: Field Manual 23-25
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1. What is the AT4?
It is a 84mm, light weight, single shot, man-portable, self contained antiarmor weapon fired from the right shoulder only
2. What is the maximum range?
2,100 meters
3. What is the maximum effective range?
300 meters
4. What is the minimum target engagement range?
30 meters
5. How many pre-fire checks are there and what are they?
The are 10 pre-fire checks:
-Ensure transport safety pin is in place/fully inserted
-Cocking lever is in SAFE condition and folded down
-Fire through muzzle cover is intact
-Launcher has a black color code band
-Sights function properly
-Red safety catch does not move when depressed
-Rear seal is not cracked or damaged
-Shoulder strap is not broken or damaged
-Carrying sling is not frayed and is firmly attached
-Red trigger button is not missing, broken or damaged
6. How large and what does the back-blast area consist of?
The black-blast area is 65 meters in a 90 degree fan behind the weapon
-Zone A ( 5 meters) combat
-Zone B (60 Meters) training
