UNIT AND DIRECT SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST) RIFLE, 5.56MM, M16A2 W/E, Carbine, 5.56MM, M4, Carbine, 5.56MM, M4a1, Plus 500 free US military manuals and US Army field manuals when you sample this book


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1. All references in the manual are to pages only. Reference to maintenance procedures is to the page where the respective initial setup appears.
2. Illustrations for the maintenance procedures show only those parts affected by the operation being performed.
3. Whenever the male gender is mentioned in the manual (i.e., crewman, repairman), it also pertains to females.
4. When the term “evacuate to support maintenance” is used, the entire rifle must be evacuated.
5. When a procedure is common to M16A2 rifle, and M4/M4A1 carbine, ONLY the M16A2 configuration will be depicted. If a procedure is not common to both weapons, the procedure will be incorporated.
6. When the word rifle is referenced in text, it will reference the rifle and the carbines.


CHAPTER 1 INTRODUCTION 1-1
External View of 5.56mm Rifle, M16A2 1-0
External View of 5.56mm Carbine, M4. 1-0.1
External View of 5.56mm Carbine, M4A1 1-0.1
Chapter Overview. 1-1
Section I General Information . 1-1
Section II Equipment Description and Data 1-3
Section III Principles of Operation. 1-6
*This manual supersedes ARMY TM 9-1005-319-23&P dated 28 August 1987, including all changes.
CHAPTER 2 UNIT MAINTENANCE INSTRUCTIONS. 2-1
Chapter Overview 2-1
Section I Repair Parts, Special Tools, TMDE, and Support Equipment . 2-1
Section II Service Upon Receipt 2-1
Section III Preventive Maintenance Checks and Services (PMCS) . 2-3
Section IV Troubleshooting. 2-20
Section V Maintenance Procedures. 2-33
Section VI Preparation for Storage or Shipment. 2-70
CHAPTER 3 DIRECT SUPPORT MAINTENANCE INSTRUCTIONS. 3-1
Chapter Overview 3-1
Section I Repair Parts, Special Tools, TMDE, and Support Equipment . 3-1
Section II Troubleshooting. 3-2
Section III Maintenance Procedures for the M16A2 Rifle, M4 and M4A1 Carbine. 3-15
Section IV Preembarkation Inspection of Materiel in Units Alerted for Overseas
Movement (A.F. Only) 3-95
CHAPTER 4 MAINTENANCE OF AUXILIARY EQUIPMENT. 4-1
Chapter Overview 4-1
Section I Auxiliary Equipment Repair . 4-1
APPENDIX A. REFERENCES A-1
APPENDIX B. MAINTENANCE ALLOCATION CHART B-1
APPENDIX C. REPAIR PARTS AND SPECIAL TOOLS LIST. C-1
Section I Introduction C-1
Section II Repair Parts List C-1-1
Group 00 5.56MM Rifle, M16A2, Carbine, M4 and M4A1. C-1-1 C-1
00.1 M4 and M4A1 Carrying Handle Assembly. C-1A-1 C-1A
00.101 M4 and M4A1 Rear Sight Assembly C-1B-1 C-1B
Group 01 Bolt carrier assembly. C-2-1 C-2
0101 Bolt assembly C-3-1 C-3
0102 Key and bolt carrier assembly . C-4-1 C-4
Group 02 Handle assembly. C-5-1 C-5
Group 03 Upper receiver and barrel assembly C-6-1 C-6
0301 Barrel assembly, M16A2 C-7-1 C-7
0301 Replacement Barrel & Front Sight Assembly, M4/M4A1. C-7-1 C-7
0302 Upper receiver assembly. C-8-1 C-8
030201 Forward assist assembly. C-9-1 C-9
030202 Rear sight assembly, M16A2. C-10-1 C-10
Group 04 Lower receiver and buttstock assembly C-11-1 C-11
0401 Buttstock assembly, M16A2 C-12-1 C-12
0401A Buttstock assembly, M4/M4A1 C12A-1 C12A
0402 Hammer assembly. C-13-1 C-13
0403 Trigger assembly. C-14-1 C-14
040301 Trigger subassembly,M16A2 and M4 C-15-1 C-15
0404 Lower receiver and receiver extension assembly, M16A2 C-16-1 C-16
0404A Lower receiver and receiver extension assembly, M4 and M4A1. C16A-1 C16A
Section III Special Tools List. C-17-1 C-17
Section IV National Stock Number and Part Number Index . I-1
APPENDIX D. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST D-1
APPENDIX E. ILLUSTRATED LIST OF MANUFACTURED ITEMS. E-1
ALPHABETICAL INDEX. Index-1