ArmaLite AR-22 Manual
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OPERATOR’S MANUAL AR-22 TEST AND TRAINING SYSTEM for the 40mm Mk19 GRENADE MACHINE GUN DISTRIBUTION: Distribution authorized to U.S. Government Agencies and their contractors. Requests for this document will be referred to ArmaLite, P.O. Box 299, Geneseo IL 61254 P.O. Box 299 Geneseo IL 61254 Tel 309-944-6939 fax 309-944-6949 [email protected]
CHAPTER 1 Introduction General Information. The AR-22 Test and Training System (TTS) for the Mk19 Grenade Machine Gun allows the Mk19 to be fired automatically during exercises, before deployment or operations, or after maintenance. It is powered by standard 7.62mm M82 blanks. Description. The AR-22 consists of a kit that includes a barrel insert, a mounting yoked with attached round discriminator, 32 belted adapter cartridges that accept M82 blanks, and appropriate hand tools required to service the kit. Safety Features: The AR-22’s barrel insert is designed to safely capture the bullet from a ball cartridge inadvertently loaded into an adapter cartridge. WARNING: Use only M82 blanks with the AR-22. Firing any other cartridge will damage the AR-22, and may damage the Mk19 Machine Gun as well. Scope: This manual covers installation, use, and maintenance of the AR-22. Maintenance Forms and Records: None. Reporting Equipment Improvement Recommendations (EIR): TBD Destruction of Materiel to Prevent Enemy Use: Not applicable. Nuclear, Biological and Chemical (NBC): Not applicable. Patent: The AR-22 is protected by U.S. Patent 5,438-907
CHAPTER 2 Operating Instructions Perform Function Check: A. Ensure the safe-fire switch shows “S”, confirming that the weapon is on safe. B. Clear the Mk19. Open the top cover assembly and inspect the feed tray, bolt face, and chamber. Make sure that there is no live ammunition in the weapon. C. Index the feed slide assembly to the left, ensuring that the secondary drive lever is engaged under the feed slide pin. D. Close and latch the top cover. E. Charge the gun and return the charging handles to the forward and up position. F. Check the function of the safety. 1. Move the safe-fire switch so that the “S” (safe) is visible. 2. Depress the trigger. The bolt should not go forward. 3. Move the safe-fire switch so that the “F” (fire) is visible. 4. Press the trigger. The bolt should spring forward forcefully. G. With the bolt forward, open the top cover and 1. Inspect the interior of the receiver for worn, damaged, dirty, or improperly lubricated parts. 2. Move the secondary drive lever back and forth to ensure that it moves freely. 3. Press the feed pawls to check for spring pressure. NOTE: If deficiencies are found and corrected the Mk19 is operational. If not correctable, the Mk19 is unserviceable. Installation of the AR-22: A. Ensure the safe-fire switch shows “S”, confirming that the weapon is on safe. B. Clean and oil the bore. C. Mount the red AR-22 yoke over the flash suppresser. It cannot be mounted incorrectly. Grasp both ends of the barrel insert and assure that the entire assembly is screwed tightly together. Insert the AR-22 barrel insert into the Mk19’s barrel. It cannot be inserted incorrectly. Screw the barrel insert into the yoke 1/8 of a turn after the washer-like springs between the yoke and the 3 nuts start to compress. DO NOT OVERTIGHTEN.
D. Pinch the front retainers of the Mk19s feed chute and swing the front outward. Insert
the round discriminator (the red piece attached to the yoke with a cable) into the
mounting point for the front retainers of the feed chute. The cable may be wound around
the barrel to remove slack.
Assembly and Loading of AR-22 Cartridge Belts:
NOTE: It’s most efficient to perform each step on all of the cartridges before moving to
the next step.
A. Use a 9mm cleaning rod or other suitable tool to push fired blanks (if any) out of the
adapter cartridges.
B. Insert each adapter cartridge base-down in the opening of the link positioning tube.
Push the adapter cartridge into the link positioning tube to push the cartridge links
forward until they stop.
C. Use the pliers to snap the cartridges together to build a belt of desired length. The
swivel of each link snaps easily into the opening of the neighboring cartridge’s link.
Build the belt to the desired length. For best reliability, it is very important to make
sure that the swivel is fully set into the opening, and that the link is fully in position
in its groove on the cartridge body.
D. Insert an M82 blank into the chamber of each adapter cartridge until it snaps into
place and can be pushed no farther. The adapter cartridges have a spring that engages the
rim of the blank to hold it in the chamber. The base of the M82 blank should be almost
flush with the base of the adapter cartridge.
E. The ammunition can is painted blue on the rear to denote that it contains a training
device. The opposite (front) of the can is left green to maintain camouflage discipline to
the front during training. Insert the loaded belt into the ammunition can with the tips of
the cartridges facing front, and with the male end of the belt (the end with the swivel on
it) resting to the right end of the can. The female end of the belt (the end without the
swivel on it) MUST be the first cartridge loaded into the Mk19.
(Note: One end of the foam tray at the bottom of the ammunition can is higher than the
other end. The high end must be placed to the right. The male end of the belt rests next
to this high end. The large panels of foam must be at the sides of the ammunition can.)
If the foam pieces within the can becomes lost or unserviceable, new ones may be
ordered from ArmaLite or recovered from residue turned in to the Ammunition Supply
Point.
Loading and Firing the Mk19. The AR-22 is fired using exactly the same procedure
use with live ammunition. Performance is best when the tripod legs are extended and
sandbagged for stability just as they should be when firing HE ammunition.
A. Ensure that the chamber is empty, the bolt is in the forward position, and charger
handles are in the up or operational position.
B. Ensure the safe-fire switch shows “S”, confirming that the weapon is on safe.
C. Insert the ammunition can into the ammunition bracket, and fix it in place with the
retainer.
D. Open the top cover and insert the first round through the feed throat into the feeder,
female link first.
E. Push the round across the first set of holding pawls, ensuring that the round is straight. The links must lie flat or the belt won’t close. F. Index the feed slide assembly to the left and close the top cover. The top cover will close easily if the adapter cartridges are in the correct position with the links lying flat, and the feed slide assembly indexed to the left. G. Charge the weapon by grasping the charger handles palms down. 1. Press the charger handle locks in. 2. Rotate the charger handles down and pull them sharply to the rear. Pull HARD because the springs are strong. THE BOLT MUST BE HELD TO THE REAR BY THE SEAR.
3. Push the chargers forward and rotate the charger handles up to the operational position. H. Place the safe-fire switch to show “F” and press the trigger. NOTE: The bolt will spring forward and load the first round onto the bolt face. NOTE: The weapon must be cycled two times to fully load a round. I. Ensure the safe-fire switch shows “S”, confirming that the weapon is on safe. J. Charge the weapon again, as above, by grasping the charger handles palms down. 1. Press the charger handle locks in. 2. Rotate the charger handles down and pull them sharply to the rear. Pull HARD because the springs are strong. THE BOLT MUST AGAIN BE HELD TO THE REAR BY THE SEAR. 3. Push the chargers forward and rotate the charger handles up to the operational position. WARNING: When firing, the charger handles MUST be in the full forward and up position or the weapon will be damaged when the bolt strikes them. Keep the weapon pointed down range. The line of fire must be clear of objects. K. Leave the safe-fire switch on “S” until ready to fire. To fire, slide the safe-fire switch to “F”, and press the trigger forward. Release the trigger to stop firing.
Fire using short bursts appropriate to this weapon. If excessively long bursts are fired the ammunition belt can “surge” and delink, just as when firing live ammunition. NOTE: When the Mk19 is mounted on the M3 tripod, ammunition is fed directly from the can. When mounted on a vehicle, attach the ammunition can bracket to the slots on the guns cradle and set the ammunition can on the bracket, securing it with the retaining pin. Unloading the Mk19 Machine Gun A. Ensure the safe-fire switch shows “S”, confirming that the weapon is on safe. B. Lock the bolt to the rear by grasping the charger handles palms down. 1. Press the charger handle locks in. 2. Rotate the charger handles down and pull them sharply to the rear. Pull HARD because the springs are strong. 3. Push the chargers forward and rotate the charger handles up to the operational position. C. Remove the round or spent casing from the bolt face. 1. Inset the tip of a caliber .50 cleaning rod through the right hand rail as close to the bolt face as possible, and above the cartridge. 2. Pivot the rod up to push the case down and force it off of the bolt face and out the bottom of the receiver. WARNING: DO NOT LET THE TOP COVER SLAM SHUT FROM THE OPEN POSITION. THE OPERATOR MAY BE INJURED OR THE MACHINE GUN COULD BE DAMAGED. D. Open the top cover. E. Remove remaining rounds from the feed tray. 1. With one hand beneath the feed tray, press the primary and secondary positioning pawls. 2. At the same time, slide the linked rounds out of the feed tray and feed throat.