Maintenance Of Barrel Assembly Gas Collar And Gas Regulator Cont

REASSEMBLY (Cont)

6. Screw in NEW Front Sight Post (18) clockwise (CW) using Spanner Wrench (17) until threads on Front Sight Post (18) are even with the number of threads exposed before removal.

M249 Front Sight Spanner Wrench

NOTE

Rezeroing weapon will be required by using unit if any parts of front sight assembly are removed or repaired.

NOTE

If a gunner has a problem in zeroing his weapon in elevation, a front sight post adjustment may be required. Each 1/2 turn of the sight post is equal to 1 mil of elevation. Each mil of elevation moves the group on the target approximately 30 cm (12 inches) at 300 meters and 50 cm (20 inches) at 500 meters.

To raise the impact group, screw the To lower the impact group, screw the sight post down clockwise (CW). sight post up counterclockwise (CCW).

To raise the impact group, screw the To lower the impact group, screw the sight post down clockwise (CW). sight post up counterclockwise (CCW).

Front Sight Post Spanner Wrench M249
2-16. MAINTENANCE OF HANDGUARD ASSEMBLY.

This task covers:

Disassembly/Inspection/Repair/Reassembly

INITIAL SETUP

Tools and Special Tools

References

Tool Kit, Small Arms Repairman

TM 9-1005-201-10

SC 5180-95-CL-A07

TM 9-08671A-10/1A

Tool Kit, Small Arms Repairman

USMC TAM No. E2900

Equipment Condition

Handguard Assembly removed.

Personnel Required

MOS 76Y Supply Clerk/Unit Armorer

Materials/Parts

MOS 2111 Infantry Weapon Repairer

Retaining Clip 9348314

(USMC)

Retaining Clip 9348461

DISASSEM BLY/INSPECTION/REPAIR

DISASSEM BLY/INSPECTION/REPAIR

NOTE

Prior to disassembly remove two rod sections, scraper assembly, handle assembly, chamber brush, bore brush and swab holder. After repair reinstalI as shown in TM 9-1005-201-10/TM 08671A-10/1A.

Scraping Tool M249

2-38. MAINTENANCE OF HANDGUARD ASSEMBLY (Cont).

DISASSEM BLY/INSPECTION/REPAIR (Cont)

1. Remove Retaining Clip (1) and discard. Pull out Grooved Pin (2).

1. Remove Retaining Clip (1) and discard. Pull out Grooved Pin (2).

Firing Pin The M249

2. Visually inspect Pin (2) for bends or burrs. Replace if damaged.

3. Remove two Spring Pins (3) and (7) and discard. Separate two Retaining Clips (4) and (6) and visually inspect for bent or broken legs. Replace if damaged.

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    What to look for when inspecting gas regulator for m249?
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