18 Questions
What is the rate of fire in semi-automatic mode?
45-65 rpm
What happens during the 'Unlocking' phase of the cycle of operation?
The breach of the barrel is unsealed
Which step occurs immediately after the 'Firing' phase in the cycle of operation?
Unlocking
What is the purpose of the 'Cocking' phase in the cycle of operation?
To position the firing mechanism in cock position
What is the muzzle velocity of the weapon?
3250 fps
How many notches on the winding drum equal 100 m of range adjustment?
35.71 notches
What is the operating principle of the Rifle Cal. 5.56mm M16A1?
Gas operated
How many cycles of operation does the Rifle Cal. 5.56mm M16A1 have?
8
What is the primary function of the gas operation in the Rifle Cal. 5.56mm M16A1?
To cycle the action
What is the significance of the 8 cycles of operation in the Rifle Cal. 5.56mm M16A1?
It ensures the rifle is reliable and efficient
How does the gas operation affect the rifle's performance?
It enables the rifle to cycle efficiently
What is the result of the gas operation in the Rifle Cal. 5.56mm M16A1?
The rifle cycles efficiently
What is the first step when the rifle is not cocked?
Proceed to the next step
What is the purpose of the left thumb when holding the balance of the stock?
To rest on the bolt catch
What is the caution related to the takedown pin?
It may come out free of the receiver
What happens when the bolt carrier is removed from the receiver?
The charging handle will fall from the receiver
When is the lower receiver group to be disassembled?
Only when absolutely necessary for maintenance
What is the correct position of the muzzle when working on the upper receiver group?
To the left
Study Notes
Rifle Cal. 5.56mm M16A1 Characteristics
- Air cooled, magazine fed, shoulder weapon, semi-automatic or automatic, gas operated
Parts of the Rifle
- Upper Receiver Group
- Lower Receiver Group
- Bolt Carrier Group
General Data
- Weight:
- Rifle w/o magazine & sling: 6.5 lbs
- Rifle w/ 20 rds magazine: 7.5 lbs
- Rifle w/ 30 rds magazine: 7.9 lbs
- Empty magazine (20 rds): 0.25 lbs
- Empty magazine (30 rds): 0.31 lbs
- Length:
- Rifle w/ bayonet knife: 44.25 in
- Rifle w/ flash suppressor: 39 in
- Rifle w/o flash suppressor: 38 in
- Barrel w/ flash suppressor: 21 in
- Barrel w/o flash suppressor: 20 in
Cycle of Operation
- Firing: firing pin strikes the primer of the cartridge
- Unlocking: unsealing the breach of the barrel
- Extracting: removing the empty cartridge from the receiver
- Ejecting: throwing out the empty cartridge from the chamber
- Feeding: placing a cartridge into the receiver
- Chambering: moving the cartridge from the magazine to the chamber
- Locking: sealing the cartridge from the magazine to the chamber
- Cocking: positioning the firing mechanism in cock position
Bolt Carrier Group
- Muzzle velocity: 3,250 fps
- Cyclic rate of fire: 700-800 rpm
- Maximum rate of fire:
- Semi-automatic: 45-65 rpm
- Automatic: 150-200 rpm
- Sustained rate of fire: 10-15 rpm
Ammunition
- Cal: 5.56mm
- Types:
- Ball M193
- Tracer M196
- Blank M200
Disassembly and Assembly
- Clear the weapon
- Point the selector lever to “SAFE” position
- Remove the sling and place the rifle on a table
- Turn the weapon on its right side and press on the takedown pin
- Press the receiver pivot pin and separate the upper from the lower receiver group
- Disassemble the bolt carrier group
Test your knowledge of the M16 rifle's features and functionality, including its adjustable range settings, muzzle velocity, rate of fire, and ammunition types. This quiz covers the technical specifications and operational details of the M16 rifle.
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