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M16 / M4. Malfunctions & Corrective Actions. M16 / M4. Firing Unlocking Extracting Ejecting Cocking Feeding Chambering Locking. Cycle of Operation. Next. M16 / M4. Firing. Firing Unlocking Extracting Ejecting Cocking Feeding Chambering Locking. Ejecting. Types of Failures. - PowerPoint PPT Presentation
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Malfunctions&
Corrective Actions
M16 / M4
M16 / M41. Firing2. Unlocking3. Extracting4. Ejecting5. Cocking6. Feeding7. Chambering8. Locking
NEXT
Cycle of Operation
1. Firing2. Unlocking3. Extracting4. Ejecting5. Cocking6. Feeding7. Chambering8. Locking
M16 / M4Types of Failures
FIRING
CYCLE ANIMATI
ONQUIT
FEEDING
EJECTING
M16 / M41. Firing2. Unlocking3. Extracting4. Ejecting5. Cocking6. Feeding7. Chambering8. Locking
Cycle of Operation
BACK
M16 / M4Immediate ActionSPORTS
Slap the magazine to ensure it is fully seated
Pull the charging handle fully to the rear
Observe for the ejection of a round or shell
Release the charging handle; do not ride it
Tap the forward assist
Squeeze the trigger and attempt to fire
HOMEBACK
M16 / M4Failure to Fire
CYCLE ANIMATI
ONNEXT
Description
The trigger is pulled, and although the hammer falls on the round, the bullet is not fired from the chamber.
M16 / M4Failure to FireCauses
The most common cause of a failure to fire is an improper loading sequence.
The second most common reason is failure of the bolt to go completely into battery, which is often caused by bad
ammunition or a dirty rifle.
The common, non-mechanical reason is a bad primer.
CYCLE ANIMATI
ONNEXTBACK
M16 / M4Failure to FireCorrective Action
SPORTS
To remedy a failure to fire, execute SPORTS.
While clearing this malfunction, keep the muzzle up to allow gravity to aid clearing and to keep your vision oriented towards
the threat or threat area.
CYCLE ANIMATI
ONHOM
EBACK
M16 / M4Failure to Feed
CYCLE ANIMATI
ONNEXT
Description
Failure-to-FeedA round is not picked up by the bolt and/or chambered.
Double FeedTwo rounds are picked up by the bolt and attempted to be chambered
Bolt Override (double feed) The shock of firing dislodges a round from the magazine and if the shooter is at an odd angle, it can become jammed into the gas tube
M16 / M4Failure to FeedCauses
Failure to feed malfunctions are almost entirely caused by an unserviceable magazine.
Although unlikely, another reason for failure to chamber a round is dirt or grime on the round casing.
CYCLE ANIMATI
ONNEXTBACK
M16 / M4Failure to FeedCorrective Action (1/2)
CYCLE ANIMATI
ONNEXTBACK
SPORTS
This is remedied using SPORTS.
If done properly, the malfunction will be cleared before the word “malfunction” gets out of the shooter’s mouth.
Failure-to-Feed
M16 / M4Failure to FeedCorrective Action (2/2)
CYCLE ANIMATI
ONHOM
EBACK
1. Lock the bolt to the rear2. Remove the magazine3. Clear the feed way4. Reload rifle5. Re-engage as necessary
Double Feeds
M16 / M4Failure to Eject
CYCLE ANIMATI
ONNEXT
Description
Failure to UnlockBrass is stuck in the chamber and is holding the bolt closed
Stove-pipe (failure to eject)An expended case is sticking out of the ejection port at a 90˚angle
M16 / M4Failure to EjectCauses
The most common cause of a failure unlock is ammunition that is slightly of shape round casing.
The common cause of a stove-pipe is shooting too close to an object, where the ejected casing would bounce back into the
ejection port.
CYCLE ANIMATI
ONNEXTBACK
M16 / M4Failure to EjectCorrective Action (1/2)
CYCLE ANIMATI
ONNEXTBACK
1. Grasp charging handle2. Strike rifle butt on ground3. Inspect chamber4. Insert magazine5. Seat magazine6. Charge rifle7. Re-engage if necessary
Failure to Unlock(Mortar Method)
M16 / M4Failure to EjectCorrective Action (2/2)
CYCLE ANIMATI
ONHOM
EBACK
As the shooter begins SPORTS, he should see the empty casing sticking out of the ejection port and immediately cease the “Pull” portion of SPORTS.
With the other hand, remove the casing while the bolt is partially back, before the bolt can pick up another round from the magazine
Stove-pipe