1st 50th Infantry Association

WHAT'S NEW?
1. Background Information
2. Instructions
3. Quiz No. 2. M16 Rifle
4. Send in your questions!

Return to the Home Page
1/50 Infantry KIA
Newsletter, and News
G-rated Fun and Games
Unit History
Maps & Photographs
Assoc. Reunion
Message Board
Contact the Association
Member's E-mail List
Post Exchange
Association Constitution
Application
Links to recommended sites

Trivia Quiz Number 2 - M16A1 Rifle

1st Battalion, 50th Infantry

"Play the Game"

Jokebook
Books about the Vietnam War
Films and Videos about the Vietnam War
Isn't It Ironic?
Wanted Posters
Poetry in War
Nam-era Music
Nam-era Art
War Photography
Chaplain's Corner
Rest & Recuperation
War Memorabilia
Sports
Trivial Pursuit

Background on the M16 Rifle

The M16A1 was the standard U.S. Infantry weapon during the Vietnam War. Marred by teething problems when first introduced, the key advantages of massive firepower and lightweight ammunition made it a formidable weapon once modifications were sorted out.

The specification for a small caliber weapon was raised in 1957, and two rifle designs were produced for testing in 1958. The Winchester-Western Division of Olin Matieson Corporation produced a .224 Winchester lightweight military rifle. The Armalite Division of Fairchild Engine and Airplane Corporation produced the AR-15. Following the tests, Winchester ceased work and Fairchild (Armalite) sold the rights to the AR-15 in December 1959 to Colt's Patent Fire Arms Manufacturing Company, Inc.for $75,000 plus 4.5% royalties.

In 1960 the US Air Force tested the AR-15 at Lackland Air Force Base, Texas, as a replacement for the U.S. Carbine, Caliber .30, M2 as the standard weapon for security guards and other limited use. In 1962, after additional testing and modifications, the Air Force adopted the AR-15 and redesignated it as the M16 rifle. Colt was also able to get the Department of Defense's Advanced Research Project Agency (ARPA) to test 1,000 weapons in its Vietnam-oriented Project Agile. An enthusiastic report led to more studies from the Department of Defense and the Department of the Army, and in November 1963 despite strong Army opposition, Defense Secretary McNamara ordered 85,000 M16's for Vietnam for use by airborne, air assault, and special forces units. 19,000 were also ordered for the Air Force.

Extensive Army before and before accepting the M16 required a number of modifications, the most noticeable being addition of a forward assist assembly to enable soldiers to manually close the bolt. Nevertheless, it was felt that the M16 with its light weight and short length was ideally suited for the tropical warfare encountered in the jungles of Southeast Asia. Field tests proved that the M16 rifle was well suited for tropical warfare, but more modifications were required. Modifications were complete by February 1967, and the M16 rifle was accepted as a standard service weapon and redesignated the M16A1.

Early reports from Vietnam by the Ordnance Corps showed that the M16 was not living up to expectations, with both reliability and accuracy problems. These reports praised the M14 which the Ordnance Corps had developed, and the dispute prompted McNamara to seek independent evaluation of both weapons. Further evaluation concluded that M14 was not as bad as had been suggested by some although it was heavier and troops couldn't carry as much ammunition, while the M16 itself was not as good as its proponents suggested. Basically, problems were twofold: the rifle jammed if not kept extremely clean and troops were neither trained nor equipped to clean it When these problems were belatedly addressed with the M16A1, the rifle performed well and is now the longest serving infantry weapon in U.S. history. The current version, the M16A2 was issued in 1991 and the M4 Carbine version was adopted in 1994.

Instructions

How much do you remember about the M16? Take this quiz and see.

For the answers, please click on the button at the end of the test. Good luck!

Quiz 2. U.S. Army Infantry Weapons of the Vietnam War

Question 1:
    Which statement best describes the M-16 Rifle?
      Light weight, gas operated, air cooled, clip fed, selective rate shoulder fired weapon.
      Light weight, gas operated, air cooled, magazine fed, selective rate shoulder fired weapon.
      Light weight, recoil operated, air cooled, magazine fed, selective rate shoulder fired weapon.
      Light weight, gas operated, air cooled, magazine fed, automatic fire shoulder fired weapon.
Question 2:
    How much does the M-16 weigh with sling and 30-round magazine?
      8.25 pounds (3.75 kilograms)
      8.5 pounds (3.9 kilograms)
      8.79 pounds (4 kilograms)
      9.5 pounds (4.3 kilograms)
Question 3:
    What rifle is shown on the Combat Infantryman's Badge (CIB)?
      M1907 Springfield Rifle
      1795 model Springfield Arsenal musket.
      U.S. Rifle, Caliber .30, M1.
      U.S. Rifle, M16A1E2
Question 4:
    How many subassemblies does the M16 break down into?

      Four:
      (1) Bolt Carrier Assembly,
      (2) Charging Handle Assembly,
      (3) Upper Receiver and Barrel Assembly and
      (4) Lower Receiver and Buttstock Assembly.
      Five:
      (1) Small Arms Sling,
      (2) Bolt Carrier Assembly,
      (3) Charging Handle Assembly,
      (4) Upper Receiver and Barrel Assembly and
      (5) Lower Receiver and Buttstock Assembly.
      Six:
      (1) Magazine,
      (2) Small Arms Sling,
      (3) Bolt Carrier Assembly,
      (4) Charging Handle Assembly,
      (5) Upper Receiver and Barrel Assembly and
      (6) Lower Receiver and Buttstock Assembly.
      Eight:
      (1) Magazine,
      (2) Small Arms Sling,
      (3) Bolt Carrier Assembly,
      (4) Charging Handle Assembly,
      (5) Upper Receiver,
      (6) Barrel Assembly,
      (7) Lower Receiver Assembly, and
      (8) Buttstock Assembly.
Question 5:
    What are the markings on standard-issue Colt-made production 20 round M16 magazines?
      Pre-1967 magazines are marked "M16" and later magazines are marked "M16A1".
      Pre-1970 magazines are marked "CAL. .223" and later magazines are marked "CAL. 5.56MM".
      Pre-1985 magazines are marked "CAL. 5.56MM" and later magazines are marked "M4 Ball".
      Pre-1969 magazines are marked "CAL. .223" and later magazines are marked "CAL. 5.56MM".
Question 6:
    How many "effective" rounds do the 20 and 30 round magazines for the AR15/M16 hold?
      Both 20 round capacity and 30 round capacity magazines should be loaded two rounds short to avoid jamming.
      The 20 round capacity magazines hold 20 rounds and the 30s can be loaded with a full 30 rounds.
      Both 20 round and 30 round capacity magazines can hold an extra round to fool the enemy.
      20 round capacity magazines should never be loaded with more than 18 rounds, but the 30s take a full load.
Question 7:
    What are the markings on standard-issue Colt-made production 30 round M16 magazines?
      Pre-1967 magazines are marked "M16" and later magazines are marked "M16A1".
      Pre-1970 magazines are marked "CAL. .223" and later magazines are marked "CAL. 5.56MM".
      Pre-1985 magazines are marked "CAL. 5.56MM" and later magazines are marked "M4 Ball".
      Pre-1969 magazines are marked "CAL. .223" and later magazines are marked "CAL. 5.56MM".
Question 8:
    30 round magazines have various color followers. Which color follower is most in demand with collectors?
      Black plastic followers, marked with the Colt pony and 5.56mm on the floorplate.
      Green plastic followers, marked with the Colt pony and 5.56mm on the floorplate.
      Green plastic followers, with manufacturer's name (Adventureline, Parsons, Labelle, Center, Okay) and city on floorplate.
      Green plastic followers, with manufacturer's name (Sanchez or Cooper's) and city on floorplate.
      Teflon-coated gray or black plastic followers marked with "Cal. 5.56mm", a part number, and "Made in U.S.A."
      Black plastic followers, marked with "Colts Mfg. Co.", "CAL. 5.56" and the Colt pony on the floorplate,
Question 9:
    What caliber is the M16 Rifle?
      .16 caliber.
      .30 caliber.
      .45 caliber.
      .223 caliber.
      .556 caliber.
Question 10:
    What was the maximum range of the M16 Rifle?
      1,804.5 feet (550 meters).
      2,624.8 feet (800 meters).
      2,800 feet (853 meters)
      11,800 feet (3,600 meters).
Question 11:
    Which statement best compares the basic difference between the M14 and the M16 that replaced it?
      The M16 is shorter, lighter, has same maximum range as the M14, but is more effective within 215 yards (200m) or less.
      The M16 is shorter, lighter, has a shorter maximum range than the M14, but is an automatic weapon.
      The M16 is longer, lighter, has the same maximum range as the M14, but has a tighter shot group on full automatic.
      The M16 is shorter, lighter, has a longer maximum range than the M14 and therefore makes a better sniper weapon.
Question 12:
    What are the M16A1's normal modes of fire ?
      single shot, semiautomatic and fully automatic selected through the use of a selector lever.
      single shot, semiautomatic(three round bursts) and fully automatic selected through the use of trigger control.
      semiautomatic (single shot) and automatic fire (3-round bursts) selected through the use of a selector lever.
      fully automatic fire (full magazine), burst (3-rounds) or semiautomatic fire through the use of a selector lever.
Question 13:
    How long is the M16A1, and how long is its barrel?
      The M16A1 is 43 inches (109.22 cm) long and has a 24 inch (610mm) long barrel.
      The M16A1 is 44.14 inches (112,1 cm) long and has a 22 inch (560mm) long barrel.
      The M16A1 is 39.37 inches (1 meter) long and has a 20 inch (510mm) long barrel.
      The M16A1 is 37.5 inches (95,25 cm) long and has an 20 inch (510mm) long barrel.
Question 14:
    What is the M16A1's cyclic rate of fire?
      1,000 rounds per minute
      900 rounds per minute
      800 rounds per minute.
      700 rounds per minute.
Question 15:
    What rate of fire can be sustained indefinitely for the M16A1?
      8-10 rounds per minute
      12-15 rounds per minute
      45 rounds per minute.
      90 rounds per minute.
Question 16:
    What is the muzzle velocity of the M16A1?
      1,804.5 feet (550 meters) per second.
      2,800 feet (853 meters) per second.
      2,624.8 feet (800 meters) per second.
      11,800 feet (3,600 meters) per second.
Question 17:
    Was the rear sight on the M16A1 changed with introduction of the M16A2?
      No, both rear sights were fixed.
      No, both rear sights were adjustable for elevation.
      Yes, the fixed M16A1 rear sight was made adjustable for elevation on the M16A2.
      Yes, the adjustable M16A1 rear sight was made fixed on the M16A2.
Question 18:
    Which of the following modifications was NOT applied to the M16 to improve performance in Vietnam?
      Development of a new powder to reduce fouling and decrease the rate of fire.
      A new buffer to slow the rate of fire.
      A new buttstock w/storage space for a cleaning kit.
      A chrome plated chamber and barrel to improve rust resistance
      A closed prong flash-hider that didn't snag on vegetation.
      A 30-shot magazine to allow firing more ammunition between changing magazines.
Question 19:
    Which best describes the safety catch on the normal M16-type safety?
      A two-position safety switch on the left side flips rear for safe and forward for automatic fire.
      A three-position safety switch on the left side flips rear for safe, vertical for single shot and forward for automatic fire.
      A three-position safety switch on the left side flips forward for safe, vertical for automatic fire and rear for single shot.
      A four-position safety switch flips rear for safe, up for single shot, down for semiautomatic and forward for automatic.
Question 20:
    What is the acronym for immediate action with the M16 when a stoppage occurs?

      REEBA
      (1) Rounds. Failure to feed, chamber or lock.
      (2) Extract. Check for dirty or defective extractor.
      (3) Eject. Worn, stuck, damaged ejector or spring.
      (4) Bolt. Dirty bolt catch or faulty magazine.
      (5) Assembly. Check correctly assembled.

      SPORT
      (1) Slap firmly on bottom of magazine.
      (2) Pull charging handle to the rear.
      (3) Observe chamber for ejection of the round.
      (4) Release the charging handle.
      (5) Try to shoot (attempt to fire).

      STOP
      (1) Safety first.
      (2) Training.
      (3) Observation.
      (4) Pull out the round.
      CRAP
      (1) Clear rifle.
      (2) Reload.
      (3) Attempt to fire.
      (4) Place weapon on ground facing downrange
            if cause is not corrected.


Submit your 1/50th, Vietnam War and Nam-era Trivia!

Email your trivia items and corrections to this quiz to 1/50(M) Trivia. Please include answers. :-)

Home ] [ Bn KIA's ] [ News ] [ Stand-down ] [ History ] [ Photographs ] [  Reunion ] [ Message Board ] [ Contact the Association ] [ Email Members ] [ PX ] [ Constitution ] [ Online Application ] [ Links ]