M4 Flashcards
What is the FM concerning the M4 Rifle
FM 3-22.9
What is the first thing you must done when you handle a weapon
Make sure you clear it.
Name the Five phases in Basic Rifle Marksmanship
Preliminary Rifle Instruction Downrange Feedback Field Fire Advanced Rifle Marksmanship Advanced Optics Laser and Iron sights
What is the purpose of a weaponeer
Capable of simulating all BRM live fire scenarios without firing rounds. Immediate feedback is available for critiquing the soldiers application of integrated offering while using the weaponeer device to include misfiring procedures
What are the four fundamentals of Marksmanship
Steady Position
Proper Aim
Breathing
Trigger Squeeze
During PMI what are the only two firing positions tone
Individual foxhole unsupported
prone unsupported
What are the two basic elements of sight picture
Sight alignment
placing of an aiming point
What does the acronym SPORTS stand for?
Slap Pull Observe Release Tap Shoot
What is remedial action?
the continuing effort to determine the cause of stoppage and to try to clear the stoppage once it is identified
Describe the proper procedure for applying remidal action to the M4
Try to place the weapon on safe
remove the magazine
Lock the bolt to the rear
Place the weapon on safe if not already done
Describe the proper procedure for applying immediate action to the M4
Slap upward on the magazine to ensure it is fully seated, and the magazine follower is not jammed
Pull the charging handle fully to the rear
Observe for ejection of a round or expended cartrdge (if it fails to eject perform remedial action)
Release the charging handle without riding it forward.
Tap the forward assist to ensure bolt closure
Squeeze the trigger and try to fire
What are the steps required in order to mechanically zero the M4?
Adjust the front sight post until the base is flush with the front sight post housing
Adjust the elevation knob counterclockwise until the rear assembly rests flush with the detachable carrying handle and the 6/3 marking is aligned with the index line on the left side of the carrying handle
Adjust the aperture so the unmarked aperture is up and the 0-200 meter aperture is down Rotate the windage knob to align the index mark on the 0-200 meter aperture with the long center index line on the rear sight assembly
What are the steps required in order to battle sight zero the M4
Adjust the elevation knob counterclockwise until the rear assembly rests flush with the detachable carrying handle and the 6/3 marking is aligned with the index line on the left side of the carrying handle.
Adjust the aperture so the unmarked aperture is up and the 0-200 meter aperture is down. Rotate the windage knob to align the index mark on the 0-200 meter aperture with the long center index line on the rear sight assembly.
Is SPORTS an immediate or remedial action?
Immediate Action
What is Immediate action
Quickly applying a possible correction to reduce a stoppage without performing troubleshooting procedures to determine the actual cause
How many times should immediate action be applied to a weapon
Once, if it fails apply remedial action
What is a malfunction
The weapon ceasing to fire due to stoppage resulting from mechanical failure of the weapon magazine or ammo
Name the different categories of malfunction for the M4 rifle
Failure to feed, chamber or lock
Failure to fire cartridge
Failure to extract
Failure to eject
What is stoppage
Failure of an automatic or semi automatic weapon to complete cycle of operation
How do you clear stoppage
Apply immediate or remedial action
What is the definition of maximum effective range
The greatest distance to which a soldier may be expected to make a target hit
What does CLP stand for?
Cleaner - Contains solvents that disolve residue and carbon from firing
Lubricant - Lays down a layer of teflon as it tries to provide lubrication
Perservative - Prevents rust from forming
Describe the M4 rifle
A 5.56 MM magazine feed, gas operated, air cooled, semi-automatic or three round burst, hand held shoulder fired weapon
What are the 7 types of ammunition that can be used with the M4 rifle?
Ball Trace Dummy Blank Red tip Ball Green tip Ball Short range training ammo
Describe the weights of the M4 rifle without magazine and sling, with sling and loaded 20 round magazine, with sling and loaded 30 round magazine
Without magazine: 6.49 Pounds
With Sling and 20 round magazine: 7.19 pounds
With sling and 30 round magazine 7.50 pounds
Describe the maximum effective rates of fire for the M4 Rifle
Semiautomatic - 45 rounds a minute
Burst - 90 rounds a minute
Sustained 12-15 rounds a minute
What is the muzzle velocity of the M4 rifle?
2970 feet per second
Describe the ranges for the M4 rifle
Maximum Range is 3600 meters
Maximum Effective range for a point target is 500 meters
Maximum Effective range for an area target is 600 meters
Describe the barrel rifiling of an M4
Right hand twist 1/7
What is the basic load of ammunition for the M4
7 magazines containing 30 rounds each for a total of 210 rounds
The elevation knob adjusts the point of aim for an M4 by how much?
300-600 meters
What is the overall length of the M4 rifle?
Buttstock closed 29.75 inches
Buttstock open 33.00 Inches
What are the four positions of the buttstock for the M4 rifle
Closed
1/2 open
3/4 open
Full open
What are the 8 steps in the functionining of an M4 rifle
Feeding chambering locking Firing unlocking extracting ejecting cocking
What part of the M4 rail adapter system may be removed to perform PMCS
Only the lower assembly
Describe the proccedures for clearing the M4 rifle
Have a battle buddy to help observe the process
Ensure the weapon is in the safe position
Point the weapon in the designated safe direction
Remove the magazine
Lock the bolt to the rear
Have observer verify there is no round chambered
return the bolt to the foward position
Place the weapon on Semi
fire the weapon
Charge the weapon
return the bolt to the forward position
place weapon on safe
Close the ejection port
How do you perform a functions check on the M4 rifle
Clear the weapon
1. Check to ensure carbine is clear and the selector lever is on SAFE.
2. Check M4 or M4A1 carbine with selector lever in the SAFE position. a. Pull the charging handle to the rear and release it. b. Place the selector lever in the SAFE position. c. Squeeze the trigger (the hammer should not fall). d. Stop the function check if the carbine fails to function properly. Turn in malfunctioning carbine to unit armorer. 3. Check M4 or M4A1 carbine with selector lever in the SEMI position. a. Place the selector lever in the SEMI position. b. Squeeze the trigger, holding it to the rear (the hammer should fall). c. Continue to hold the trigger to the rear while pulling the charging handle to the rear and releasing the charging handle. d. Release the trigger with a slow, smooth motion until the trigger is fully forward (the hammer should not fall). e. Squeeze the trigger (the hammer should fall). f. Stop the function check if the carbine fails to function properly. Turn in malfunctioning carbine to unit armorer. 4. Check M4A1 carbine with selector lever in the AUTO position. a. Place the selector lever in the AUTO position. b. Pull the charging handle to the rear and release it. c. Squeeze the trigger; the hammer should fall. d. Hold the trigger to the rear and cock the weapon. e. Fully release the trigger; squeeze it to the rear again; and the hammer should not fall. f. Stop the function check if the carbine fails to function properly. Turn in malfunctioning carbine to unit armorer. 5. Check M4 carbine with selector lever in the BURST position. a. Place the selector lever in the BURST position. b. Pull the charging handle to the rear and release it. c. Squeeze the trigger and hold it to the rear; the hammer should fall. d. Continue to hold the trigger to the rear: pull the charging handle to the rear and release it three times. e. Release the trigger.
