29 1. 2 ORGANIZATIONAL MAINTENANCE OF THE M242 29 3 TERMINAL LEARNING OBJECTIVE ACTION: CONDUCT ORGANIZATIONAL MAINTENANCE ON THE M242 25-MM CHAIN GUN

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ORGANIZATIONAL

MAINTENANCE OF THE

M242

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TERMINAL LEARNING OBJECTIVE

ACTION: CONDUCT ORGANIZATIONAL MAINTENANCE ON THE M242 25-MM CHAIN GUN.

CONDITION: IN A CLASSROOM ENVIRONMENT, GIVEN A TM 9-1005-200-23&P, M242 25-MM STUDENT HANDOUTS AND A M242 25-MM GUN WITH STAND AND TOOLS.

STANDARD: STUDENT MUST ACHIEVE A MINIMUM OF 80% ON BOTH WRITTEN EXAMS (OB/CB) AND RECEIVE A GO ON THE HANDS ON EVALUATION.

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SAFETY

• Watches and rings removed(taped)

• Watch out for gun stands while walking

• No sleeping in class

• Use caution when using the tools and cutting lacing wire.

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Risk Assessment

• Classroom Environment• Adequate Rest• Heat and Cold are no factors• Instructor experience extensive• Complexity of task is minimal• Only hazard is heavy equipment in classroom• Combat lifesaver on site• Risk is low

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Environmental Considerations

• Dispose of wiping rags, drink containers and used paper in accordance with local recycling regulations.

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REFERENCES

• TM 9-1005-200-23&P (JUNE 2001)

• M242 25-MM STUDENT HAND OUT

• BLANK DA FORM 2408-4

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CONDITION: IN A CLASSROOM ENVIRONMENT, GIVEN A TM 9-1005-200-23&P, M242 25-MM STUDENT HANDOUTS AND A M242 25-MM GUN WITH STAND AND TOOLS.

STANDARD: STUDENT MUST ACHIEVE A MINIMUM OF 80% ON BOTH WRITTEN EXAMS (OB/CB) AND RECEIVE A GO ON THE HANDS ON EVALUATION.

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ENABLING LEARNING OBJECTIVE A

• ACTION: DEFINE THE CHARACTERISTICS AND CAPIBILITIES OF THE M242 25-MM CHAIN GUN.

• CONDITION: IN A CLASSROOM ENVIRONMENT, GIVEN A M242 25-MM GUN, TM 9-1005-200-23&P, A M242 25-MM STUDENT HANDOUT AND A M242 GUN STAND WITH TOOLS.

• STANDARD: THE STUDENT MUST CORRECTLY DEFINE ALL OF THE CHARACTERISTICS AND CAPABILITIES OF THE M242 25-MM CHAIN GUN, IAW TM 9-1005-200-23&P AND THE M242 25-MM STUDENT HAND OUTS.

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1.0hp 24vdciiii

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M242, 25-MM, AUTOMATIC CHAIN GUN

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121. AUTOMATIC GUN FEEDER ASSEMBLY2. AUTOMATIC GUN RECEIVER ASSEMBLY3. BARREL ASSEMBLY

M242, 25-MM AUTOMATIC GUN

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BARREL ASSEMBLY

COUNTERS SOME EXPLOSIVE RECOIL FORCE

HELPS CONTAIN EXPLOSIVE FORCE

ASSEMBLY

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BARREL ASSEMBLY

Old Configuration

New Configuration

NSN CHG

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BARREL ASSEMBLY

2. 25-MM BARREL3. ROUND PLAIN NUT4. MACHINE KEY5. MUZZLE BRAKE

1. COTTER PIN2. 25-MM BARREL5. MUZZLE BRAKE

1

2

3

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BARREL ASSEMBLY• RIBBED BARREL ASSY HAS TWO TYPES OF

INTERNAL FINISHES, NITRIDE AND CHROME. EITHER TYPE IS USABLE ON THE STANDARD GUN, THE CHROME BARREL ASSY IS REQUIRED ON THE ENHANCED GUN. NON-RIBBED BARREL ASSY IS ONLY USED ON THE STANDARD GUN.

• AVERAGE PERFORMANCE LEVELS: STANDARD ROUND=4000 RDS (NSN) RIBBED(NITRIDE)=5000 RDS RIBBED(CHROME)=7000 RDS *ALL AP (M919 OR M791)= 3000 RDS STD-$6086 ENH-$8297

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BARREL EROSION GAGE

INSPECTION FOR EROSION IS THE SAME FORALL BARREL CONFIGURATIONS. (WP 0023 00-6)

EROSION GAGE ROD

GAGE HEAD

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(AGI) SYSTEM BG 10

MEASUREMENTS ARE TAKEN AT 16 PRE-DETERMINED POSITIONS ALONG THE BARREL ASSY AND THE VALUES STORED IN ITS ELECTRONICS UNIT. AT EACH POSITION THE MEASUREMENT IS AUTOMATICALLY COMPARED TO PRE-STORED WARNING /REJECTION LIMITS OF WEAR. THE PROCESS TAKES LESS THAN THREE MINUTES PER BARREL ASSY AND MAY BE ACHIEVED WITH THE BARREL INSTALLED.

ALL DATA THAT IS STORED DURING THE MEASUREMENTS IN THE NONVOLATILE SYSTEM OF THE BG10 MEMORY MAY BE SUBSEQUENTLY DOWN-LOADED VIA THE INTEGRAL RS232 SERIAL PORT TO A PERSONAL COMPUTER.

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AUTOMATIC GUN FEEDER ASSEMBLY

FORWARD FEED SECTION

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Forward Feed Section Subcomponents

1. Forward Feed Assembly

2. Upper Feed Sprocket Assembly

3. Lower Feed Sprocket Assembly

4. Round Positioner Assembly

5. Feeder Assembly Rotor

6. Ejection Chute

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1. SOCKET HEAD CAP SCREW2. MOUNTING BRACKET3. RIGHT CONNECTING LINK4. FEEDER STAND-OFF5. LINK SHIELD6. SMALL CARTRIDGE GUIDE7. SOCKET HEAD CAP SCREW8. RIGHT CONNECTING LINK9. MOUNTING BRACKET10. SOCKET HEAD CAP SCREW11. FORWARD FEED ASSEMBLY12. NUT, SELF LOCKING, HEAD13. SLEEVE SPACER14. SPECIAL SPRING15. FORWARD FEEDER GATE

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16. ROUND POSITIONER ASSEMBLY17. UPPER FEED SPROCKET ASSEMBLY18. LOWER FEED SPROCKET ASSEMBLY19. SOCKET HEAD CAP SCREW20. EJECTION CHUTE


16. ROUND POSITIONER ASSY17. UPPER FEED SPROCKET ASSY18. LOWER FEED SPROCKET ASSY19. SOCKET HEAD CAP SCREW20. EJECTION CHUTE21. SOCKET HEAD CAP SCREW

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21. FEEDER ASSEMBLY ROTOR22. STEPPED SPACER23. RIGHT CONNECTING LINK24. FEEDER DRIVE ASSEMBLY25. RIGHT CONNECTING LINK26. UPPER CARTRIDGE GUIDE


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1. UPPER SPUR GEAR2. UPPER SLIDING SLEEVE CLUTCH3. UPPER SHOULDERED SHAFT4. CLUTCH YOKE ASSEMBLY5. WORM WHEEL GEAR6. LOWER SHOULDERED SHAFT7. LOWER SLIDING SLEEVE CLUTCH8. LOWER SPUR GEAR9. PLATE ASSEMBLY REAR FEEDER10. SCREW CAP SOCKET HEAD11. GEAR CLUTCH ASSEMBLY


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12. SOCKET HEAD CAP SCREW13. ELECTRICAL FEED SELECT SOLENOID14. BODY ASSEMBLY SOLENOID15. SOLENOID CABLE CONNECTOR16. MACHINE SCREW17. BUSHING CAM ASSEMBLY18. COMPRESSED HELICAL SPRING19. BUSHING BRACKET ASSEMBLY20. SLEEVE SPACER21. SELF LOCKING NUT22. FLAT WASHER23. FEEDER HANDLE24. RETAINING RING25. WORM SHAFT ASSEMBLY26. FEEDER HANDLE LATCH27. TIMER ROD28. LATCH, PIVOT PIN29. FEED SHAFT STOP ASSEMBLY30. ACTUATOR31. FORK SHAFT ASSEMBLY

AUTOMATIC GUN FEEDER DRIVE ASSEMBLY

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32. COVER ACCESS33. LEVER TIMER34. PAWL-SHAFT ASSEMBLY35. INDEX DRIVE SHAFT36. TIMING CAMS W/ ROTOR STUB37. SOCKET HEAD CAP SCREW38. INDEX DRIVE COVER39. CONTROL CAM40. RETAINING RING41. BPI COVER42. SOCKET HEAD CAP SCREW43. MANUAL DRIVE HUB ASSEMBLY44. FEEDER HOUSING 45. FEEDER DRIVE ASSEMBLY


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1. COTTER PIN2. FLAT SPRING3. POSITIONER,PLATE4. HEADED STRAIGHT PIN5. SLEEVE BUSHING6. SOCKET HEAD CAP SCREW7. FLAT WASHER8. HEAD SELF LOCKING NUT


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AUTOMATIC GUN RECEIVER ASSEMBLY

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Receiver Assembly Subassemblies

1. Barrel Support Assembly

2. Recoil Mechanism

3. Breech Assembly

4. Sear Assembly

5. Sear Catch Assembly

6. Sear Retractor Assembly

7. Mechanical Safety Interlock System

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Receiver Assembly Subassemblies

8. 1.0 HP 24 VDC Motor Assembly

9. Handle Pin

10.Electrical Sear Solenoid

11.Riveted Receiver

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1. COTTER PIN2. HOUSING RECOIL CAP3. HEADED STRAIGHT PIN4. PERFORMED PACKING5. 25-MM RECOIL MECHANISM6. SOCKET HEAD CAP SCREW7. RETAINING RING8. MACHINE KEY9. COTTER PIN10. COMPRESSED HORIZONTAL SPRING11. HEADED STRAIGHT PIN12. BARREL LOCK PIN13. DAMPER NUT14. BREACH ASSEMBLY15. SPRING PIN16. BARREL SUPPORT ASSEMBLY


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17. BOLT AND TRACK ASSEMBLY18. RETAINING RING19. SLEEVE BUSHING20. ELECTRICAL SEAR SOLENOID21. HEADED STRAIGHT PIN22. SOCKET HEAD CAP SCREW23. SEAR RELEASE LINK24. STRAIGHT DRIVE SHAFT25. SOCKET HEAD CAP SCREW26. COVER ASSEMBLY27. SEAR CATCH ASSEMBLY28. SEAR ASSEMBLY


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29. ROCKER ASSEMBLY30. ROCKER31. SPRING PIN32. COMPRESSED HELICAL SPRING33. ROCKER SPRING HOUSING34. FORWARD CHAIN GUIDE35. REAR CHAIN GUIDE36. INTERLOCK CRANK37. PUSH ROD EXTENSION38. SEAR PUSH ROD39. COMPRESSED HELICAL SPRING40. OPERATING ROD ASSEMBLY41. REAR TRACK42. ROD ROCKER SUPPORT43. SPRING PIN44. HANDLE PIN45. COMPRESSED HELICAL SPRING46. SET SCREW47. EXTERNALLY RELIEVED SCREW48. SEAR RETRACTOR PIVOT49. SEAR RETRACTOR ASSEMBLY50. COMPRESSED HELICAL SPRING51. LATCH BRACKET52. SPRING TENSION WASHER53. TRACK HOOK LATCH54. HEADED SOCKET CAP SCREW


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55. HANDLE STRAIGHT PIN56. RIVETED RECEIVER 57. HEADED SOCKET CAP SCREW58. 1.0 HP, 24 VDC MOTOR ASSY59. ANNULATING BALL BEARING60. SMALL BEVEL GEAR60. LARGE BEVEL GEAR61. PREFORMED PACKING62. CLUTCH ASSEMBLY63. SHOULDERED CLUTCH SHAFT64. TORSION SPIRAL SPRING 165. TORSION SPIRAL SPRING 266. HANDLE CLUTCH STRAIGHT PIN67. SPUR CLUTCH GEAR SHAFT68. SCREW THREADED INSERT69. SOCKET HEAD CAP SCREW70. HEAD SELF-LOCKING NUT71. MECHANICAL HOUSING72. SHOULDERED DRIVE SPROCKET SHAFT73. ANNULATING BALL BEARING74. GEAR CLUSTER 75. NEED ROLLER BEARING76. SPUR ASSEMBLY GEAR77. PLAIN INCASED SEAL


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BOLT AND TRACK ASSEMBLY

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1. TRACK ASSEMBLY2. BOLT AND CARRIER ASSEMBLY


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1. BREECH BOLT2. FIRING PIN, SLEEVE KEEPER3. CAM PIN ASSEMBLY4. CARRIER ASSEMBLY5. FIRING PIN SLEEVE6. FIRING PIN ASSEMBLY

BOLT AND CARRIER ASSEMBLY

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Old Configuration12524325

New Configuration12524512

Milled Flats

FIRING PIN ASSEMBLY

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1. PREFORMED PACKING2. SAFETY ACTUATOR PAWL3. COMPRESSED HELICAL SPRING4. SAFETY PAWL5. FIRING PIN PAWL6. HEADED STRAIGHT PIN7. COMPRESSED HELICAL SPRING8. ROUND PLAIN NUT9. SPRING PIN10. ROLLER CHAIN TRACK11. SPROCKET WHEEL12. ROLLER ASSEMBLY CHAIN13. SPROCKET RETAINER14. CLEVIS ASSEMBLY15. SPRING PIN16. MANUAL CONTROL HANDLE17. COMPRESSED HELICAL SPRING18. SPRING TENSION WASHER19. SPROCKET SHAFT ASSEMBLY20. SPROCKET WHEEL

TRACK ASSEMBLY

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25-MM EQUIPMENT DATA

Caliber: 25-mm dual feed

Weight: Receiver Assy 90 lbs

Barrel Assy 95 lbs (Enh-107 lbs )

Feeder Assy 59 lbs

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Rate of fire: single shot,100,200 rds/pm

Time of rate: 0.15 sec, The delay from the time the gun receives the signal to start until mechanical actions begins to start.

Time to stop: 0.12 sec,The delay from the time the gun receives the signal to stop until mechanical actions begins to stop.

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Power required: 1.0 hp 24 vdc motor assy

Clearing method:(cook-off safe) open bolt

Safety: Absolute hang-fire protection (msis)

Case ejection: forward

Peak recoil force: 12,000 pounds force (std)

9,000 pounds force (enh)

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Reliability demonstrated: 22,000 (MRBF)

Dispersion: 0.5 mil

Misfire: Total failure of a round to fire

Hang-fire: Delay in the firing of a round

Cook-off: Accidental firing of a round due to excessive heat build up in the weapon system.

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• Fire

• Unlock

• Extract

• Eject

• Sear/Charge

• Feed

• Chamber/Ram

• Lock

Eight Step Cycle of Function

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Sear/ Charge

Eject

Feed

Lock

Unlock

Chamber/ Ram

Fire

Extract

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Sear/Charge

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Feed

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Feed Dwell

• Slider moves left to right in slider path.

• Bolt and Carrier Assembly is 25-mm to the rear of Sear, it’s rearmost position.

• This is happening to allow the Feeder Assembly Rotor to sweep the spent casing into the ejection chute and place a new round on the face of the bolt assy.

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Chamber/Ram

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Lock

The bolt assembly is in its most forward possible position with the bolt carrier still moving forward. The cam pin assembly,

moving in its channel in the carrier, causes the bolt assembly to rotate 30 degrees

counterclockwise; the bolt assembly locking lugs engage the breech assembly locking lugs, giving a safe, solid lock.The firing pin assembly is fully cocked. The BPI arrow is rotating through the RED ZONE PRIOR TO

FIRE.

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Fire

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Fire Dwell• Slider moves right to left in slider path

• Bolt Assembly is locked in the Breech Assembly

• This is happening to allow hot propellant gases to escape returning chamber pressure to ambient(safe levels).

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Unlock

Once the slider has completed its right-to-left movement, it starts moving to the rear, pulling

the bolt carrier with it. As the bolt carrier is pulled to the rear, the cam pin assembly, moving

in its channel, causes the bolt assembly to rotate clockwise and unlock from the breech

assembly. The firing pin assembly is simultaneously withdrawn to the rear. As the bolt assembly unlocks, the BPI points to the

beginning of EXTRACT.

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Extract

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Eject

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Ramming/Extracting

Positive round control is provided by the:

• Positive T-slot extractors

• Continuous rim guide

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DUAL FEED SYSTEM

• Link-aligners can move a long round 9.5mm back.

• Chamber surface on the rear plate assembly can move a short round 3.1mm forward.

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DOUBLE FEED PREVENTION•The incoming round is positively prevented from feeding across into the ram position; the nose of the incoming round is ahead of the base of the round left in the chamber.•The positive T-slot extractors failing

•NOTE: BASED ON M792/M793 AMMO. THE M791/M910/M919 MISSING NOSE CAPS MAY ALLOW DOUBLE FEED SITUATION TO OCCUR!!

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66ATK M791 GD M910ATK M910GD M791 GD M919

MAX HT

MIN HT

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RECOIL MECHANISM

• Two ring spring set

• Hydraulic Damper

• 85%

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SEAR ASSY

Controlled by the electrical sear solenoid and mechanical safety

interlock system. Locks roller assembly chain in the event of

misfire by engaging the safety link, or in the

sear position by engaging the master

link.

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Bolt and Carrier Assembly

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Bolt and Carrier Assembly

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TRACK ASSEMBLY

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PITCH

• THE DISTANCE BETWEEN THE ROLLER ASSY CHAIN; MEASURED FROM THE TOP OF THE CHAIN TO THE MIDDLE OF THE CHAIN AND THEN AGAIN FROM THE BOTTOM OF THE CHAIN TO THE MIDDLE OF THE CHAIN.

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Old Configuration12524325

New Configuration12524512

Milled Flats

FIRING PIN ASSEMBLY

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FIRING PIN ASSY

• FALL IS 0.56 INCH (14.2 MM)

M115 PERCUSSION PRIMER

• DELIVERS 32 INCH-LBS

REQUIRES 19 INCH-LBS

• SAFETY MARGIN 13 INCH-LBS

BOLT FACE PROTRUSION 2-MM

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MECHANICAL SAFETY INTERLOCK SYSTEM

• Rocker assembly

• Operating rod assembly

• Interlock crank

• Push rod extension

• Sear push rod

• Sear assembly

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ROCKER ASSEMBLY

Pushed down by the Breech AssemblyIt then pulls the Operating Rod

Assembly which disengages the

Interlock crank Crank

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OPERATING ROD ASSEMBLY

Pulled forward by the Rocker Assembly which disengages the Interlock Crank

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PUSHROD EXTENSION

• Forced upward

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INTERLOCK CRANK

• Becomes Disengaged

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SEAR PUSHROD

• It is pushed out

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SEAR ASSY

Moved out of the way

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Mechanical Safety Interlock System Failure Modes

• Push rod extension or externally relieved

screw breaks

• Bolt Carrier Cam Breaks

• Sear Assembly Breaks

• Interlock Crank Breaks

• Electrical Sear Solenoid intermittent

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TIMING OF POWER TRAIN

• FEEDER HOUSING DISASSEMBLED

• FEEDER ASSY REMOVED FROM RECEIVER ASSY

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POWER TRANSMISSION SYSTEM

• 1.0 HP 24 VDC MOTOR ASSEMBLY

• FEEDER DRIVE ASSEMBLY

• CHAIN AND BOLT DRIVE**

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1. 1.0 HP 24V DC MOTOR ASSEMBLY

2. ELECTRICAL SEAR SOLENOID

3. ELECTRICAL FEED SELECT SOLENOID

4. INDEX DRIVE CABLE ASSEMBLY

ELECTRICAL SYSTEM

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1.0HP 24VDC MOTOR ASSY

between 18 and 30 Vdc is required and drives the

auto gun receiver and auto gun feeder gears.

Contains junction and connectors for interface between automatic gun receiver assembly and automatic gun feeder

assembly.

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ELECTRICAL SEAR SOLENOID

Controls sear assembly by moving sear release link and sear push rod.

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ELECTRICAL FEED SELECT SOLENOID

Provides manual or electrical selection of ammunition type

(AP or HE).

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Index Drive Cable Assembly

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S3 Breech Lock Sensor

S1 Seared Sensor

S2 Normal Shutdown

Sensor

Microswitch Sensor Harness Assembly

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1ST timed sequence 52.2 ms from S-3 breech lock sensor to S-2normal shutdown sensor

Start

Stop

1st 30 ms


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Stop / Start

Stop


Start 2nd timedSequence 52.2msfrom S-2Normal Shutdown to S-1Seared Sensor

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Index Drive Cable Assembly

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ENABLING LEARNING OBJECTIVE B

• ACTION: EXPLAIN THE DA FORM 2408-4.

• CONDITION: IN A CLASSROOM ENVIRONMENT, GIVEN A BLANK DA FORM 2408-4.

• STANDARD: STUDENT MUST FILL OUT ALL INFORMATION CORRECTLY, IAW UP DATE 14.

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DA FORM 2408-4

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IIIIIIIIIIIIIIIIIIIIIIIIII

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IIIIIIIIIIIIIIIIIIIIIIIIII

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ENABLING LEARNING OBJECTIVE C

• ACTION: CONDUCT MAINTENANCE PROCEDURES ON THE M242 25-MM GUN.

• CONDITION: IN A CLASSROOM ENVIRONMENT, GIVEN A TM 9-1005-200-23&P, M242 25-MM GUN, GUN STAND WITH TOOLS.

• STANDARD: STUDENT MUST CONDUCT MAINTENANCE PROCEDURES ON THE M242 25-MM GUN IAW TM 9-1005-200-23&P.

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TM 9-1005-200-23&P• TROUBLESHOOTING• MAINTENANCE INSTRUCTIONS• PREVENTIVE MAINTENANCE CHECKS AND

SERVICES(PMCS)• GENERAL MAINTENANCE• TORQUE PROCEDURES• REPAIR PARTS LIST• MAC CHART• SMR CODE• CROSS REFERENCE INDEXES• SPECIAL TOOLS• EXPENDABLE/DURABLE ITEMS

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TORQUE PROCEDURES

• 1ST DIVISION-6> 1000 th -ROUND UP

• 2ND DIVISION-5> 10 th - ROUND UP

• X .113 FOR N-m

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EXAMPLE: Required torque is 270-300 in-lb. (30.51-33.9 N-m)

Length of torque wrench is 22 in. (558.8 mm) Length of adapter is 3 in. (76.2 mm)

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ENABLING LEARNING OBJECTIVE D

• ACTION: CONDUCT DISASSEMBLY AND ASSEMBLY OF THE M242 25-MM GUN.

• CONDITION: GIVEN A CLASSROOM ENVIRONMENT, A M242 25-MM GUN, TOOLS AND TM 9-1005-200-23&P.

• STANDARD: THE STUDENT WILL PERFORM DISASSEMBLY AND ASSEMBLY ON THE M242 25-MM GUN, IAW TM 9-1005-200-23&P.

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M242 RECEIVER ASSY

0026

0052

0058

0059

0067

0069

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M242 RECEIVER ASSY0023 0060

0026 0061

0052 0063

0053 0064

0058 0065

0059 0067

0049 0069

0050

0051

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M242 FEEDER ASSY

0037 0036

0038 0039

0031 0040

0033 0041

0034 0042

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0026 0038

0027 0031

0028 0033

0029 0030

0032 0039

0034 0040

0036 0041

0037 0042

0043

M242 FEEDER ASSY

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M242 BOLT & TRACK ASSY

0053

0054

0055

0056

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CONDITION: IN A CLASSROOM ENVIRONMENT, GIVEN A TM 9-1005-200-23&P, M242 STUDENT HANDOUTS AND A M242 25-MM GUN WITH GUN STAND AND TOOLS.

STANDARD: STUDENT MUST ACHIEVE MINIMUM OF 80% ON BOTH WRITTEN EXAMS(OB/CB) AND RECEIVE A GO ON ALL HANDS ON EVALUATIONS.

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GUN,25MM,M242GUN, 25MM,M242 BIC 1ST BN, 29TH IN REGT

WL258BREPLACE BREECH ASSYAT 25,000RDS(ENH>25,000REPLACE FIRING PIN ASSY8,000 /12,000 RDS

M242 BFV SERIAL NUMBER 2AB4001 ALL ROUNDS HAVE A EFC OF 1.0

RECEIVER ASSY 5500 FIRING PIN 1

BREECH

13 AUG 94 8,00017,0008,000 CPT

30 AUG 94 8,030 16,9707,970

SSG

30 SEPT 948,080

TPDS-T

TPDS-T

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50 16,9207,920

SSG

6 OCT 94 TP-T 800 8,880 16,1207,120

SSG

30 OCT 94 TP-T 47 8,927 16,0737,073

CPT

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IIIIIIIIIIIIIIIIIIIIIIIII

IIIIIIIIIIIIIIIIIII

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ELECTRICAL SYSTEM

PROVIDED-18-30 VDC

SAFETY- 2 VDC

O

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Documents

29 1. 2 ORGANIZATIONAL MAINTENANCE OF THE M242 29 3 TERMINAL LEARNING OBJECTIVE ACTION: CONDUCT ORGANIZATIONAL MAINTENANCE ON THE M242 25-MM CHAIN GUN