WPN 1003

INTRODUCTION TO WEAPONSMAINTENANCE

WPN 1003

INTRODUCTION TO WEAPONSMAINTENANCE

OVERVIEW

• M16A4 DISASSEMBLY• CARE AND CLEANING• M16A4 ASSEMBLY• FUNCTIONS CHECK

DISASSEMBLE THE M16

1) Always ensure your weapon is clear–Selector lever on safe–Point the weapon in a safe direction

2) Remove the sling

1 2

2

DISASSEMBLE THE M16

3) Push both takedown pins as far as they will go.4) Separate upper and lower receivers.

3

DISASSEMBLE THE M16

(5) Pull back charging handle and bolt

carrier.

(6) Remove charging handle.

(7) Remove bolt carrier and bolt.

5 & 6 7

DISASSEMBLE THE M16

8) Remove firing pin retaining pin.

9) Push bolt assembly inward to locked

position.

8 & 9

DISASSEMBLE THE M16

10) Drop firing pin out to the rear of bolt carrier.11) Remove bolt cam pin.12) Remove bolt assembly from carrier.

10

11

12

DISASSEMBLE THE M16

CHARGING HANDLE

FIRING PIN

CAM PIN

BOLT CARRIERFIRING PIN RETAIN PIN

BOLT ASSEMBLY

REMOVE THE BUFFER AND ACTION SPRING

13 & 14

13) Press in buffer, depress retainer, and release buffer.14) Remove buffer and action spring.

NORMAL MAINTENANCE

• INSPECTION– RUST– WORN, BROKEN, OR CRACKED PARTS– KEEP MUZZLE CLEAR

• BEFORE FIRING– LIGHT LUBRICANTS ON ALL MOVING PARTS– CHAMBER, BORE, FACE OF BOLT DRY

CLEANING GEAR COMPONENTS

• BORE BRUSH• CHAMBER BRUSH• GENERAL PURPOSE BRUSH• CLEANER, LUBRICANT, & PRESERVATIVE

BOTTLE• (3) CLEANING RODS AND HANDLE• CLEANING ROD TIP• POUCH

CLP

• CLEANER - Contains solvents.• LUBRICANT - Lays down a layer of

teflon.• PRESERVATIVE - Prevents rust

from forming.

CARE AND CLEANING:UPPER RECEIVER

• Attach three rod sections and bore brush together

• Apply CLP to the brush, drop it through chamber, and pull the cleaning rod through the barrel

• Inspect the bore• Attach patch holder• Insert rod through chamber

• Attach chamber brush to one rod and insert into chamber

• Scrub the chamber and bolt lugs by plunging and rotating

• Clean the interior with general purpose brush and CLP

• Dry the bore, chamber, and interior with patches

CARE AND CLEANING:UPPER RECEIVER

CARE AND CLEANING: BOLT CARRIER

• Scrub with the all purpose brush and CLP• Insert a swab into the rear of the bolt and swab

out the firing pin recess and gas ports• Dry with cloth rags or patches• Q-tips or pipe cleaners • One drop of CLP

CARE AND CLEANING: LOWER RECEIVER

• Clean buffer recess with cloth dipped in CLP

• Ensure it is free of dirt, mud• Apply 1 drop of CLP to each pin of the

trigger assembly• Dry up excess with q-tips• Lube/apply light coat

MAINTENANCE IN DIFFERENT CLIMATES

• Hot, wet (jungle): keep generously lubed

• Hot, dry (desert): keep free of dirt build up

–If CLP is used, use sparingly

• Cold, arctic (snow): use lubricating oil, arctic weapons (LAW) if temperature exceeds below -35 degrees– If taken inside, wipe moisture away and

apply lubricant.–May have to leave weapon in protected area

MAINTENANCE IN DIFFERENT CLIMATES

LUBRICANTS:UPPER RECEIVER

• Lightly lube the inside of the upper receiver, bore, chamber, outer surfaces of the barrel, and surfaces of the handguard

• Lube all parts of the rear sight assembly

LUBRICANTS:BOLT CARRIER GROUP

• Lube the outside of the cam pin area

• Lightly lube the charging handle

LUBRICANTS: LOWER RECEIVER

• Lightly lube the inside of the lower receiver

• Lube the inside moving parts and their pins

(1) Insert action spring and buffer. (2) Slide bolt into carrier.

2

REASSEMBLE THE M16A4

1

(3) Replace bolt cam pin.(4) Drop and seat firing pin.(5) Pull bolt out until extended.

3 4

5

REASSEMBLE THE M16A4

(6) Replace firing pin retaining pin.(7) Engage, then push charging handle part way.(8) Slide in bolt carrier group

6 7

8

REASSEMBLE THE M16A4

(9) Push charging handle and bolt carrier group together. (10) Join upper and lower receivers.(11) Engage takedown pins.(12) Ensure weapon is on SAFE.

9 10

11 12

REASSEMBLE THE M16A4

REPLACE SLING

FUNCTION CHECK

• SAFE: Pull the charging handle to the rear and release, placing on safe, pull trigger, hammer should not fall

• Semi:• Selector lever on semi• Pull the trigger and hold, the hammer should fall• While holding the trigger to the rear charge the

weapon once• Release the trigger, you will hear a clunk • Squeeze the trigger again, the hammer should

fall

FUNCTION CHECK

• Charge the weapon once and place on burst: • Squeeze the trigger, the hammer should fall • While holding the trigger to the rear, charge the

weapon three times • Release the trigger, you should hear an audible

clunk. Squeeze the trigger again, the hammer should fall

• Charge the weapon once and place the weapon on safe

• Close the ejection port cover

FUNCTION CHECK

SUMMARY

• M16A4 DISASSEMBLY• CARE AND CLEANING• M16A4 ASSEMBLY• FUNCTIONS CHECK