Clear feeder of ammunition. Make sure gun is on S (SAFE).
(1) Broken or Worn Feed Pawls. Clear the weapon and check to see if the primary and secondary pawls are broken, worn, without spring action, or the pin is missing or dislodged. If they are, turn the MK 19 into unit level maintenance.
(2) Badly Worn or Gouged Link Guides. Clear the weapon and check to see if the guides are worn or gouged. If they are, turn the MK 19 into unit level maintenance.
(3) Binding Feed Slide Assembly. Clear the weapon. Remove the feed slide assembly and tray. Clean, inspect and lubricate feed assembly and tray. If the feed slide assembly continues to bind, report the defects to armorer or support maintenance.
e. Bolt Won't Pick Up the Round. A misfire might occur because a bolt won't pick up the round.
(1) Charging Handles are Down. Clear the weapon. Raise the charging handles before firing. If the weapon still does not fire, report defects to the armorer or support maintenance.
(2) Dirt-Clogged, Weak, or Damaged Extractors. Clear the weapon and remove obstruction. Clean, lubricate, and reload weapon. Continue with the exercise.
(3) Feed Slide Out of Adjustment. Clear the weapon. The feed slide is out of adjustment if:
• Extractors won't pick up round.
• Round stubs on face of chamber. Report defects to armorer or support maintenance.
f. Bolt Drops a Round Before Firing. A stoppage may occur because a bolt drops a round before firing.
(1) Weak or Damaged Extractors or Bolt Fingers. Clear the weapon and check for weak or damaged extractors or bolt fingers. Report any defects to the armorer or support maintenance.
(2) Binding Receiver Rails. A misfire might occur because of binding receiver rails. Clear the weapon and pull the bolt to the rear without stopping or pausing. Ease it forward (holding onto one charging handle while you press the trigger) and check for binding. Place weapon on S (SAFE) and remove backplate pin. Lift up slightly on the backplate assembly and pull the bolt and backplate assembly to the rear. Remove the chargers. Check the charger rails and receiver rails for burrs. Report defects to armorer or support maintenance.
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