M16 A3 M4A1 CARBINE OPERATOR TRAINING KNOW POST TEST ANSWER

NKO Posttest - M16A3/M4A1 Carbine Operator Training

All ammunition is removed, chamber is empty, action is closed, and safety is on. Which general condition code is this?

Condition 1

Condition 2

Condition 3

Condition 4

Match the Weapons Condition Code to appropriate Action.

1. Safety on, magazine removed, chamber empty, bolt forward, ejection port cover closed.

2. Safety on, magazine inserted, round in chamber, bolt forward, ejection port cover closed.

3. Not applicable to the M16 (series) rifle.

4. Safety on, magazine inserted, chamber empty, bolt forward, ejection port cover closed.

Condition 11 2 3 4

Condition 21 2 3 4

Condition 31 2 3 4

Condition 41 2 3 4

Which General Weapon Condition Code DOES NOT apply to the M16 Rifle?

Condition 4

Condition 1

Condition 2

Condition 3

Match the Weapon Condition Codes to the corresponding action

1. Condition 1

2. Condition 2

3. Condition 3

4. Condition 4

All ammunition is removed, chamber is empty, action is closed, and safety is on. 1 2 3 4

Ammunition is in position to be chambered, chamber is empty, action is closed, and safety is on. 1 2 3 4

Not applicable for weapons being covered. 1 2 3 4

Ammunition is in a position to be fired, safety is on. 1 2 3 4

1


A danger message is an Operating or maintenance procedure, practice, or condition that, if not strictly observed __________ result in death or serious injury, or threatens the primary mission of the ship.

What caliber is the M16A3 rifle ?

5.56 mm

7.62 mm

9 mm

20 mm

44 mm

What is the maximum effective range of the M16A3 rifle?

500 ft (152 m)

1,500 ft (457 m)

1,804 ft (550 m)

3,000 ft (914 m)

5,000 ft (1524 m)

11,811 ft (3,600 m)

What is the life expectancy of the M16A3?

15,000 rounds

20,00 rounds

25,000 rounds

50,000 rounds

75,000 rounds

100,000 rounds

What is the maximum range (in meters) of the M16 Rifle?

4,200 meters

2,800 meters

2

WILL


3,200 meters

3,600 meters

What is the cyclic rate of fire in automatic mode for the M4A1 rifle?

25 rounds per minute






What caliber is the M4A1 rifle?

5.56 mm

7.62 mm

9 mm

20 mm

44 mm

What is the maximum effective range of the M4A1 rifle?

500 ft (152 m)

1,500 ft (457 m)

1,640 ft (500 m)

1,750 ft (614 m)

5,000 ft (1524 m)

11,811 ft (3,600 m)

What is the life expectancy of the M4A1?

15,000 rounds

3


20,00 rounds

25,000 rounds

50,000 rounds

75,000 rounds

100,000 rounds

What are the two magazine capacities available for the M4A1?

10 and 20 rounds

20 and 30 rounds

30 and 40 rounds

40 and 50 rounds

50 and 60 rounds

60 and 70 rounds

Which major component group consists of the cartridge extractor, ejector, and firing pin?

Cartridge Magazine Assembly

Bolt Carrier Assembly

Upper Receiver Assembly

Lower Receiver Assembly

Which major component group consists of the base plate, follower, and housing?





Which major component group holds cartridges ready for feeding and provides a guide for positioning cartridges for stripping?




4



Identify the component shown in the picture below.

Charging Handle Assembly

Barrel Assembly



.




Cartridge Magazine

5


Barrel Assembly


Cartridge Magazine

Upper Receiver and Barrel Assembly







Magazine Assembly

Which component houses the action spring, the buffer assembly, and the extension assembly?


Cartridge Magazine

Rifle Barrel Assembly

Upper Receiver

Buttstock Assembly

Lower Receiver

What is the name of the safety feature that blocks the movement of the trigger preventing disengagement of the sear surfaces between the trigger and the hammer, thus preventing the weapon from firing should trigger be pulled.

What is the name of the safety feature that is designed to ensure that when the trigger is held rearward after a round is fired, in semiautomatic, it will catch the hammer hook.

During weapon fieldstripping a screwdriver or pry bar tool is used to remove the handguards.

True

6

SAFETY

SEAR DISCONNECTO


False

When disassembling the magazine, turn magazine away from face to prevent possible injury.

True

False

Place the carbine disassembly steps in the right order.

Disengage rear takedown pin and open receivers.

Remove bolt carrier and key assembly.

Separate upper and lower receiver groups.

Hold the upper receiver horizontally, and pull charging handle about three inches to rear.

While squeezing upper and lower receiver together, push left end of front pivot pin into lower receiver.

Disengage receiver pivot pin.

Remove Sling.

Remove the charging handle.

Place the bolt carrier assembly disassembly steps in the right order.

Remove firing pin retaining pin.

Place bolt in lock position and remove firing pin.

Remove bolt from bolt carrier and key assembly.

Turn bolt cam pin 90º and remove.

If your weapon is equipped with a removable carrying handle assembly, remove the round nuts on the left side of the carrying handle.

True

False

If the Magazine spring comes loose from the follower, pliers can be used to reattach the spring to the follower.

True

False

Place the bolt carrier assembly reassembly steps in the right order.

Drop in and seat firing pin.

7

2

4

8

3

6

7

1

5

1

2

4

3

3


Insert firing pin retaining pin.

Insert bolt cam pin.

Slide bolt into bolt carrier.

The first step to reassemble the bolt carrier assembly is to insert cam pin with firing pin hole aligned front to rear and pull bolt forward to locked position.

True

False

Place the upper receiver reassembly steps in the right order.

Insert charging handle into upper receiver.

Pull bolt to full extension within bolt carrier.

Insert carrier and bolt group into upper receiver.

Push forward on carrier until bolt and charging handle are fully forward.

Ensure hammer is cocked and safety is on SAFE.

Assemble upper and lower receivers so that the pivot pin holes are aligned.

Hold upper and lower receivers together.

Push in front and back pivot pins.

Which of the following are selector lever indicators for the M16A3/M4A1? Select all that apply.

AUTO

SEMI

BURST

MANUAL

SAFE

Number the steps to perform a safety/function check in their order of completion.

Place selector lever on AUTO.

Place selector lever on SEMI.

Place selector lever on SAFE.

A safety/function check should be performed __________.

8

4

2

1

1

2

3

4

5

6

7

8

3

2

1


after each use

anytime rifle is reassembled

annually

weekly

Many stoppages can be prevented by keeping the weapon clean and well lubricated.

True

False

Which problem listed below is associated with a lower report and reduced recoil.

Bolt is locked to the rear.

Two rounds are stuck in the receiver

Bolt is forward.

Only a portion of the propellant is ignited.

Which type of problem usually occurs as a result of not seating the magazine?

Bolt is locked to rear

Brass is obstructing the chamber

Reduced recoils

Bolt is forward

The remedial action steps below would be used to fix which problem?

1. Press the magazine catch releasing the magazine, remove the empty magazine, and stow it on person if time permits2. Insert a filled magazine into the magazine well and tug downward on the magazine to ensure it is properly seated3. Pull the charging handle to the rear and then release it to allow the bolt to move forward and chamber a round4. Sight in and attempt to fire

Reduced recoils

Brass is obstructing the chamber

Bolt is forward

Bolt is locked to rear

Which common stoppage is characterized by a double feed?

9


Brass Is Obstructing the Chamber Area

Bolt Is Locked to the Rear

Bolt Is Forward

Audible Pop/Reduced Recoil

A clearing barrel provides a safe direction in which to point a weapon when performing which of the following functions? (select all that apply)

Make Ready

Fire

Load and Make Ready

Load

Unload, Show Clear

Cease Fire

Unload

Which sling arms transport method is used primarily during periods of inclement weather to keep moisture out of the bore of the rifle.

Strong Side Sling Arms Carry

Cross Body Sling Arms Carry

Weak Side Sling Arms Carry

Identify the rifle carry type demonstrated in each photograph by placing the correct label below the appropriate image.

10


Tactical Ready Alert

Select, from the list below, the M16 Rifle, “Alert Carry” steps that apply.

Trigger finger straight along the receiver.

Firing hand around the pistol grip.

Muzzle angled down about 45 degrees and pointed in the likely direction of the enemy.

Firing thumb resting on top of the selector lever.

Muzzle angled up at near 45 degrees.

Buttstock of the rifle in shoulder.

Non-firing hand on the handguards.

11

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M16 A3 M4A1 CARBINE OPERATOR TRAINING KNOW POST TEST ANSWER