Mk 19 Feed Tray Pin Knurled

Before performing any procedure, ensure the weapon is clear of any ammunition.

DISASSEMBLY

1. REMOVE FEED THROAT ASSEMBLY (MK 19 MOD 3 ONLY).

a. Squeeze shoulder pins (1) on feed throat and pull away from receiver (2).

Feed Throat Assembly Mk19

2. REMOVE BACKPLATE PIN ASSEMBLY.

a. Place the safety on 'F' (FIRE). Retract the backplate pin assembly (3) from the appropriate side, using a screwdriver on the combination tool. Pull the backplate pin assembly straight out.

Mark Bolt Disassembly

3. REMOVE BOLT AND BACKPLATE ASSEMBLY.

a. With the backplate pin assembly removed, lift up slightly on backplate assembly and pull it out of the receiver, supporting the bolt with one hand and the control grip assembly with the other hand.

Assembly Mk19 Mod3

a. The primary drive lever is removed with the vertical cam assembly.

5. REMOVE VERTICAL CAM ASSEMBLY.

a. Support the primary drive lever (4) as shown. Slide the drive lever lock (5) on the vertical cam assembly (6) rearward about 1/8 inch. Push down on the primary drive lever's pivot post (7) to disengage. Remove primary drive lever. Slide the vertical cam rearward to remove. Protect chromed edge during removal.

Mark Bolt DisassemblyMark Disassembly

DISASSEMBLY - Continued

6. REMOVE SECONDARY DRIVE LEVER.

a. Open the top cover assembly. Locate the center hole in the outside of the top cover. Press the pivot post (8) through the hole toward the inside of the top cover. Lift up on the secondary drive lever (9) to remove it from the feed slide assembly.

Pictures With Feed Tray Open

7. REMOVE FEED SLIDE ASSEMBLY.

a. Rotate the feed tray (10) down. Move the feed slide assembly to the left in the tray until the tabs (11) are lined up with the slots in the tray. Lift the assembly out of the tray.

Mark Alignment Guide

8. REMOVE TOP COVER ASSEMBLY.

a. With the feed tray down, hold the top cover (12) straight up and pull out the knurled head straight pin (13) on both sides. Lift off the top cover assembly.

Mark Alignment Guide

9. REMOVE FEED TRAY.

a. With the top cover removed, lift the feed tray out of the receiver.

10. REMOVE ALIGNMENT GUIDE ASSEMBLY.

a. Depress the tip of the alignment guide flat spring (14) with a screwdriver tip or your fingernail and slide alignment guide assembly (15) left and out of the receiver. Slide the alignment guide assembly out of the receiver, pulling the alignment guide assembly slightly rearward.

Mark Disassembly

DISASSEMBLY - Continued

11. REMOVE OGIVE PLUNGER ASSEMBLY.

a. Pull the ogive plunger assembly (16) out through the inside wall of the receiver.

Mark Bolt Disassembly

12. REMOVE ROUND POSITIONING BLOCK.

a. With the alignment guide assembly removed, depress and push-slide the round positioning block (17) forward until it stops. Remove the assembly.

Disassembly And Assembly

13. REMOVE CHARGER ASSEMBLIES, RIGHT-HAND (RH) AND LEFT-HAND (LH).

a. With the bolt and backplate assembly removed and with the charger handle up, retract the lock plunger (18) at the base of the charger arm, using a screwdriver tip on the combination tool. Slide the charger housing rearward to disengage the lugs (19) from the keyslots (20) in the receiver. Then lift the charger assembly away from the receiver.

19 20

19 20

Sear Housing Block AssemblySear Housing Block Assembly

14. REMOVE SEAR ASSEMBLY.

a. With the bolt and backplate assembly removed, place the safety on 'F' (FIRE). Turn the receiver over. Retract the lock plunger (21) on the sear housing, using a screwdriver tip on the combination tool. Squeeze the receiver sear (22) and thumb safety together. Rotate the sear assembly 90 degrees either way, pressing down on the safety as you rotate. Now place the thumb safety on 'S' (SAFE) before you lift the assembly out of the receiver. Lift out the sear assembly.

Sear Housing Block Assembly
1LK088

15. REMOVE RECEIVER.

a. Do not remove the barrel, primary and secondary positioning pawls, or the rear sight from the receiver.

ASSEMBLY

1. INSTALL CHARGER ASSEMBLIES, RIGHT-HAND (RH) AND LEFT-HAND (LH).

a. Position the charger housing so that the lugs (1) are aligned with the keyslots (2) in the receiver wall. Press against the charger housing and slide it forward until the charger assembly locks in place.

Ogive PlungerOgive Plunger

2. INSTALL ROUND POSITIONING BLOCK.

a. Insert the pins (3) on the round positioning block (4) into the keyslots in the receiver wall with the tang end forward. Push-slide the round positioning block rearward until it stops.

3. INSTALL OGIVE PLUNGER ASSEMBLY.

a. Insert the smaller end of the ogive plunger assembly (5) through the forward wall of the receiver.

Mark Alignment Guide
q1

4. INSTALL ALIGNMENT GUIDE ASSEMBLY.

a. Depress the tip of the alignment guide flat spring (6) as you slide the alignment guide assembly (7) into the forward part of the receiver. Ensure the large hole (8) slides over the ogive plunger assembly and that the alignment guide screw (9) mates with the keyhole in the receiver.

Feed Tray Cal

ASSEMBLY - Continued

5. INSTALL FEED TRAY.

a. Install the feed tray recessed side up, aligning the pin holes in the tray with those in the receiver.

6. INSTALL FEED SLIDE ASSEMBLY.

a. Align the tabs on the feed slide assembly (10) with the slots in the feed tray (11), and insert the feed slide assembly into the tray. Make sure exposed spring is on left side of receiver.

Receiver Parts

7. INSTALL TOP COVER ASSEMBLY.

a. Line up the pin holes in the top cover (12), the feed tray, and the receiver (13). Hold the top cover straight up as you push in the knurled head straight pin (14) on each side. Ensure the knurled heads of the pins touch the top cover.

Feed Pawls For M249

8. INSTALL SECONDARY DRIVER LEVER.

a. Observing the NOTE, engage the forked end of the secondary drive lever (15) with the feed slide pin of the feed slide assembly. Raise the feed tray with feed slide assembly and secondary drive lever attached. Press the pivot post (16) through the hole in the top cover. It should snap in place.

0 0

Post a comment