Mk 19 Accuracy Test

Catch the ejected dummy round as it comes out of the bottom of the weapon. The round's ogive may become dented if the round is dropped.

v. Remove dummy ammunition from the gun, using the combination tool assembly.

w. Pulling the gun chargers to the rear, hold one gun charger to restrain the bolt. Disengage the receiver sear and allow the bolt to return safely to battery.

x. Install the feed throat assembly and repeat steps n through q using linked dummy rounds. Verify gun meets requirements of steps n through q when repeated with six linked rounds of dummy ammunition.

y. Remove last dummy round from the gun, using the combination tool assembly.

3. GUN PROOF FIRING.

a. Conduct the following before loading the weapon for tests 4 and 5:

• Load one round of 40mm high velocity ammunition and fire the gun.

• Inspect the gun and verify there are no signs of failure, deformation, or loosening of any parts.

4. SINGLE ROUND, SHORT BURST ACCURACY TEST.

a. If possible, conduct this test after boresighting or after corrective action for runaway gun:

• Load nine linked rounds into the weapon.

• Raise the gun sight aperture to 1,000 meters and adjust the T&E mechanism to acquire a 14 meter target at a known 1,000 meter range.

• Fire the nine rounds singly or in burst of three.

• Verify all nine rounds hit the target.

• Inspect the weapon and verify there is no evidence of damage, malfunction, or stoppage.

5. FIRING RATE TEST TO VERIFY NORMAL RATE OF FIRE AND RECOIL LOAD.

a. If possible, conduct this test after performing corrective action for erratic or sluggish rate of fire or for excess recoil:

• Load 10 linked rounds into the weapon.

• Raise the gun sight aperture to 1,000 meters and adjust the T&E mechanism to acquire a target at a known 1,000 meter range.

• Fire the 10 rounds in a single burst of automatic fire.

• Verify the ammunition was expended without excess recoil, damage, or stoppage, and that the firing rate during the test was neither sluggish or erratic.

• If the firing was hard, erratic, or sluggish, or if any malfunctions occurred, troubleshoot (see WP 0021 00, Symptom Index).

END OF WORK PACKAGE

DIRECT SUPPORT

MK 19 MOD 3 40 MM MACHINE GUN (NSN 1010-01-126-9063) UPGUNNED WEAPONS STATION MK 19 40 MM MACHINE GUN (NSN 1010-01-362-6513)

MAINTENANCE OF MK 19 MACHINE GUN - POST-FIRING CHECKS

POST-FIRING CHECKS

1. Repeat the inspection procedures in WP 0086 00, step 3.

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