Malfunctions & Corrective Actions

1. M16 / M4 Malfunctions&Corrective Actions

2. M16 / M4 • Firing • Unlocking • Extracting • Ejecting • Cocking • Feeding • Chambering • Locking Cycle of Operation Next

3. M16 / M4 Firing • Firing • Unlocking • Extracting • Ejecting • Cocking • Feeding • Chambering • Locking Ejecting Types of Failures Feeding Cycle Animation Quit

4. M16 / M4 • Firing • Unlocking • Extracting • Ejecting • Cocking • Feeding • Chambering • Locking Cycle of Operation Back

5. M16 / M4 • SPORTS • 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 Immediate Action Back Home

6. M16 / M4 • Description The trigger is pulled, and although the hammer falls on the round, the bullet is not fired from the chamber. Failure to Fire Cycle Animation Next

7. M16 / M4 • Causes 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. Failure to Fire Cycle Animation Back Next

8. M16 / M4 • Corrective Action To remedy a failure to fire, execute SPORTS. Failure to Fire 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 Animation Back Home

9. M16 / M4 • Description • Failure-to-Feed • A round is not picked up by the bolt and/or chambered. • Double Feed • Two 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 Failure to Feed Cycle Animation Next

10. M16 / M4 • Causes 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. Failure to Feed Cycle Animation Back Next

11. M16 / M4 • Corrective Action (1/2) • Failure-to-Feed 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 SPORTS Cycle Animation Back Next

12. M16 / M4 • Corrective Action (2/2) • Double Feeds Lock the bolt to the rear Remove the magazine Clear the feed way Reload rifle Re-engage as necessary Failure to Feed Cycle Animation Back Home

13. M16 / M4 • Description • Failure to Unlock • Brass 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 Failure to Eject Cycle Animation Next

14. M16 / M4 • Causes 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. Failure to Eject Cycle Animation Back Next

15. M16 / M4 • Corrective Action (1/2) • Failure to Unlock • (Mortar Method) Failure to Eject Grasp charging handle Strike rifle butt on ground Inspect chamber Insert magazine Seat magazine Charge rifle Re-engage if necessary Cycle Animation Back Next

16. M16 / M4 • Corrective Action (2/2) • Stove-pipe 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 Failure to Eject Cycle Animation Back Home