How The Mk 19 Sear Works

Use fingers, not pliers, to pull out pawl rod. Force can break the small crosspin on the pawl rod if not properly aligned in the slot.

Materials/Parts

Abrasive cloth, (item 3, WP 0124 00)

Equipment Condition

Barrel removed from receiver (WP 0067 00).

REMOVAL - Continued a. With the barrel removed, depress the primary pawl (1) as you pull out the pawl rod (2) with your fingers. Lift out the primary pawl and pawl spring.

Mark Machine Gun
1LK146

INSPECTION OF INSTALLED ITEMS/REPAIR

Primary Pawl (1): Examine the edges of the primary pawl for burrs. Remove burrs with a stone. Before installation, ensure the hole in the receiver for the pawl spring and primary pawl has been cleared of all dirt and debris.

Pawl Rod (2): Inspect for rust. Remove rust with lubricant and cloth. Preserve with a light coat of lubrication. Replace the pawl rod if bent or if the crosspin (3) is missing.

Pawl Spring (4): Test spring action while assembled. Press primary pawl and release. Spring action should be crisp. If spring action is not crisp, replace pawl spring.

INSTALLATION

1. INSTALL PRIMARY PAWL, PAWL ROD, AND PAWL SPRING.

a. Turn receiver upright. Insert the primary pawl spring (1) into the hole (2) in the receiver under the primary pawl (3).

b. Position the primary pawl (3) so the pinholes align with the pinholes in the receiver. Partially insert the primary pawl rod (4).

c. With one hand, depress the primary pawl (3). With the other hand, push the pawl rod (4) into the pinhole until the crosspin in the pawl rod enters the small hole in the receiver. Push the pawl pin's knurled head until it touches the receiver.

d. Press the primary pawl and release. Spring action should be crisp. END OF WORK PACKAGE

Machine Gun Parts List
INSERT SPRING INTO HOLE ON UNDERSIDE

1LK148

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 - SECONDARY PAWL DISASSEMBLY/ASSEMBLY DISASSEMBLY, INSPECTION OF INSTALLED ITEMS, REPAIR, ASSEMBLY

INITIAL SET UP

Tools and Special Tools

Tool kit, small arms repairman

SC 4933-95-CL-A07 with addition of SL-3-00607A (Marine Corps only) Tool kit, small arms repairman,

SC-5180-95-CL-A07 Tool set, intermediate maintenance, SL-3-08669A (Marine Corps only) Tool set, organizational maintenance, SL-3-08668A (Marine Corps only)

Materials/Parts

Abrasive cloth (item 12, WP 0124 00) Lubrication (as required)

DISASSEMBLY

1. REMOVE SECONDARY PAWL, PAWL ROD, AND HELICAL SPRING.

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