RIFLE, CALIBER .30: M 1, M 1C (Sniper`s), M 1D (Sniper`s)

*TM 9.1005.222.12
HEADQUARTERS, DEPARTMENT OF THE ARMY
Washington, DC., 17, March 1969
TECHNICAL MANUAL
No. 9-1005-222-12
Operator
and Organizationail
Maintenance
Manual
RIFLE, CALIBER .30: M 1,
M 1C (Sniper’s), M 1D (Sniper’s)
Editor; Jeff Lesemann
Attut; Alan Longwith
Assistant Editor; Ftatxois Rhea&
This manual is cm-tent (IS of 2 December 1968
Patagtaphs
Page
3
5
PREFACE
INTRODUCTORY CHAPTER, “Otigms and Development”
Chapter I. INTRODUCTION
Section I. General ...............................................
Il. Description and data. ...................................
l-l . l-3
l-4. l-5
13
13
Chapter 2. OPERATING INSTRUCTIONS
Section I. Controls ..............................................
Il. Operation under usual conditions. .........................
Ill. Operation of materiel used in conjunction with major item.
IV. .Ppetation unusual conditions .............................
2-1, 2-2
2-3 . 2-12
2-13. 2-14
2-15 . 2-20
15
16
17
17
3-1, 3-2
3-3 . 3-5
3-6
3-7
3-8
3-9 _ 3-11
3-12 . 3-14
19
19
20
20
...
Chapter 3. SERVICE AND MAINTENANCE INSTRUCTIONS
Section I. Service upon receipt of materiel. ..........................
11. Repair parts, special tools and equipment. ..................
111. Lubrication instructions. .................................
IV. Preventive maintenance checks and services. ................
V. Troubleshooting ........................................
VI. Operators maintenance procedures .........................
VII. Organizational maintenance procedures. ....................
::
25
Chapter 4. MAINTENANCE OF MATERIEL USED IN CONJUNCTION
WITH MAJOR ITEM ............................
4-1
39
Chapter 5. AMMUNITION ........................................
5*1. 5-2
41
Chapter 6. DESTRUCTION OF MAWRIEL TO PREVENT ENEMY USE 6-l
42
APPENDIX A. REFERENCES.. .......................................
APPENDIX B. ORGANIZATIONAL MAINTENANCE REPAIR PARTS
AND SPECIAL TOOLS LIST
Sectton I. Introduction ...........................................
Il. Basic issue items (Fig. 33,34). .............................
Ill. Maintenance and operating supplies. .......................
IV. Prescribed load allowance. ...............................
V. Repair Pans For:
Trigger housing assembly (Fig. 35). .................
Barrel and tecavet group (Fig. 36). .................
Telescope, M84 (Fig. 37). .........................
Kit, winter ttlgget (Fig. 38, 39). ....................
VI. Special Tools, test and support equipment (Fig. 33.34.40). .....
Appendix C. MAINTENANCE ALLOCATION CHART
Sectmn I. Introduction, ..........................................
Il. Maintenance allocation chart for Rifle, Caliber .30 Ml, MlC
(Sniper’s). and MID (Sniper’s). .....................
ADDENDA SUPPLEMENTAL MATERIAL
...........................
‘This manualsupersedes
TM 9.1005-222-12P12,
1
42
11 August
43
46
46
47
48
48
49
49
50
56
57
58
1965 in its entirety.
Figure I. U.S. Rij7e,Caliber .30, M I
2
TM901005-222-12
Chapter 1
INTRODUCTION
Section I.’ General
1.1. scope
These instructions
apply to Caliber
are for use by the operator and organizational
maintenance
.30 Rifles, Ml, MIC (Sniper’s) and MlD (Sniper’s).
Forms and Records
a. General. Refer to TM 38-750 (Army Equipment
personnel.
They
1-2.
Records
Procedure)
for forms and records
required.
b. Recommendations
for Maintenance
Manual Improvements.
omissions,
and recommendations
for improving
this publication
by the
encouraged.
Reports should be submitted
on DA Form 2028 (Recommended
Publications)
and forwarded
direct to:
Commanding
General
U.S. Army Weapons
Command
A-I-l-N: AMSWE-SMM-P
Rock Island, Illinois 61201
l-3.
Administrative
Refer to TM 740-90-I
Storage
for administrative
II.
Section
l-4.
Report of errors,
individual
user is
Changes
to DA
storage.
DESCRIPTION
AND DATA
Description
a. General. The Rifles, Ml, MlC (Sniper’s)
fed, gas-operated,
air-cooled,
semiautomatic
and MlD (Sniper’s)
shoulder
weapons.
(figs. 1, 10 and 11) are clip
b. Differences in Models.
(1) The MlC
(2) The MID
(3) The MlC
l-5.
Tabulated
a. Rifle, Ml.
has a telescope
mounted
to the receiver.
has a telescope
mounted
to the barrel.
and MID also require a flash hider and a cheek
pad.
Data
Weight of rifle w/o equipment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.5 lb. approx.
Weight of rifle w/bayonet
.... .
. . . . . . . . . . . . . . . . . . . . . . 10.5 lb. approx.
Length of rifle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 in.
Length of barrel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 in.
*Muzzle velocity
.. . ................................. ....
2,750-2,800
fps
*Maximum
effective
range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 yd.
*Maximum
effective rate of fire (aimed
rounds per minute)
. . . . . ... . .... . . ........
. . . . . . . . . . 16-24
*Number of cartridges
in clip
. . ... . .. .
. ....... .
..... . .
8
*Types of ammunition
. . . . . . . . . . . . . . . . . . . . . . . . . Ball, armor-piercing-incendiary,
tracer, blank, rifle grenade cartridge
and dummy
b. Rifles, MlC (Sniper’s) and MlD (Sniper’s).
Weight w/equipment
(telescope,
flash hider,
gun sling, and cheek pad)
... . .. . .. .
.. ...
Length of rifle w/flash hider, type T-37
*This
information
also applies
to the MlC
. . . . . . . . . . . . . . . . . 11.75 lb. approx.
. . . . . . . . . . . . . 46-l/8 in.
and MlD
13
Rifles.
E
iz
TM9-1005-222-12
Chapter 2
OPERATING
Ir\JSTRUCTIONS
Section I. Controls
2-I. General
This section describes, locates, illustrates, and furnishes the operator with essential information pertaining to the various controls provided to properly operate the materiel.
2-2. Controls
Refer to table 2-1.
-SAFETY
OFF
NOTE
COCh
HAMMER
Figure 12. Controols.
15
BEFORE
PLACING
SAFETY
ON
Table 2-1. Controls
Item
Purpose
(See fig. 12)
Safety
To preverit accidental
Trigger
To release hammer to effect firing.
firing.
Windage
knob
To adjust lateral movement
Elevating
pinion
To adjust elevation
To hold clip in receiver
Clip latch
Section II. OPERATION
of rear sight.
of aperture.
until last round is fired.
UNDER USUAL CONDITIONS
2-3. General
This section contains instructions for the operation of the rifles under conditions of moderate
temperatures and humidity. Instructions for operation under unusual conditions are covered in
section IV.
2-4.
a.
b.
c.
d.
Preparation
for Firing
Examine bore. Make certain it is free of powder fouling or corrosion.
Check gas cylinder lock screw for secure installation.
Check ammunition. Make certain it is clean and that it is of the proper type and grade.
Cock the rifle and place the safety in safe position (fig. I,?).
2-5. Service Before Firing
Perform the before firing operations
as indicated
in table 3-3.
2-6. Loading
Refer to FM 23-S.
2-7. Zeroing
Refer to FM 23-5.
2-8. Misfire, Hangfire, and Cook-off
Refer to FM 23-5 and paragraph 2-9b, below.
Procedures for Removing a Round in Case of Failure to Fire
a. General After failure to fire, due to misfire, the following general precautions, as applicable,
2-9.
will be observed until the round has been removed from the weapon and the cause of failure
determined.
(1) Keep the weapon trained on the target and see that all personnel are clear of the muzzle.
(2) Before retracting the bolt and removing the round, see that personnel, not required
for operation, are cleared from vicinity.
(3) Make certain the round, removed from’the weapon, is kept separate from other rounds
until it has been determined whether the round or weapon is at fault. If the weapon is determined to be at fault, the round may be reloaded.
b. Time Intervals. The definite time intervals for waiting, after failure of weapon to fire, are
prescribed as follows: Always keep the round in the chamber for five seconds from the time
a misfire occurs to insure against an explosion outside of the gun in event a hang-fire develops.
If the barrel is hot and a misfire stops operation of the gun, wait five seconds with the round
locked in the chamber to insure against hangfire dangers (a hangfire will occur within five seconds
after the primer is struck), then extract the round immediately to prevent cook-off. If the round
cannot be extracted within an additional five seconds, it must remain locked in the chamber
for five minutes because of the possibility of a cook-off. Also in the event the barrel is hot and
misfire occurs when attempting to resume firing after an intentional cessation of firing, the round
should remain locked in the chamber for five minutes because of the possibility of a cook-off.
16
t-10.
Service During Firing
Perform the during firing operations
services (table 3-3).
2-11.
as described in the operator5 preventive-maintenance
Unloading
Refer to FM 23-5.
2-12. Service After Firing
Perform the after firing operations
services (table 3-3).
Section III. OPERATION
as described
in the operator’s
preventive-maintenance
OF MATERIEL USED IN CONJUNCTION
WITH MAJOR ITEM
2-13. General
The following.materiel
is not normally used continually. Therefore, it is necessary to protect
from weather and dampness in storage. Clean and lubricate materiel as required, whether in
use or in storage.
2-14. Equipment
a. Grenade Launcher, M7A3 and Grenade Launcher Sight, Ml5 Refer to FM 23-30.
b. Bayonet-Knife,
MS and MSA 1 and Bayonet-Knife Scabbard, M0A 1. Keep bayonet
in scabbard except when removed for training, inspections, cleaning, repair, or for use in
combat or danger zones.
c. Winter Trigger Kit. Use the winter trigger kit only in extreme cold operation and on
authority of unit commander.
Section IV. OPERATION
UNDER UNUSUAL
2-15. General
Report any chronic failure of materiel resulting from subjection
CONDITIONS
to extreme conditions
(par l-2).
Operation
in Extreme Cold
a. In climate5 consistently below OOF, it is necessary to prepare the rifle for cold-weather opera-
2-16.
tion. The rifle should be thoroughly cleaned wiith SD, dry cleaning solvent, and lubricated with
LAW, weapons lubricating oil.
b. Rifles should be free of moisture and excess oil. Moisture or too much oil on the working
parts will cause them to be sluggish in operation, or perhaps to fail completely.
c. Exercise moving parts through their entire range at required intervals. This movement
helps prevent parts from freezing in place and reduces effort required to operate them.
d. Materiel not in use and stored outside must be protected with proper cover.
Note. Transferring weapon from cold to warm air may cause moisture to collect. If the weapon
is brought into a warm room, allow it to reach room temperature before cleaning and lubricating
as required.
Operation
in Extreme
Heat
a. Hot, Dry Climates.
(1) The film of oil necessary for operation and preservation dissipates quickly in hot climates.
2-17.
Inspect the rifle, paying particular attention to all hidden surfaces such as bolt and lug, operating
rod and recess, cam surfaces and bolt locking recess in receiver, where corrosion might occur
and not be quickly noticed.
(2) Perspiration from the hands contributes to rusting because it contains acids and salts.
After handling materiel, clean, wipe dry, and restore the oil film using PL special, general
purpose lubricating oil.
17
(3) Clean and oil the bore more frequently than usual.
(4) Apply linseed oil to wooden parts to prevent drying.
b. Hot, Damp, and Salty Atmosphere.
(1) See a( 1) and (2) above under hot, dry climates.
(2) Inspect materiel frequently because of increased possibility of rust.
(3) When material is active, clean and lubricate the bore and exposed metal surfaces more
frequently than prescribed for normal service.
(4) Moist and salty atmosphere tend to emulsify oils and greases and destroy their rustpreventive qualities. Inspect all parts frequently for corrosion.
(5) When materiel is inactive, cover metal surfaces with a film of PL special, general
purpose lubricating oil.
(6) Apply linseed oil to wooden parts to keep out moisture.
Operation in Dusty or Sandy Areas
a. Clean and lubricate the materiel more frequently
2-18.
in sandy or dusty areas. Exercise
particular care to keep sand out of mechanisms when carrying out inspecting and lubricating
operations. Shield parts from flying sand with tarpaulins during disassembly and assembly
operations.
b. Before operating in sandy areas, remove lubricant from bolt, barrel and receiver, operating
rod, and trigger housing assembly, as they will pick up sand and from an abrasive which will
cause rapid wear. Dry surfaces wear less than surfaces coated with lubricants contaminated with
sand. Clean and lubricate all exposed parts after action is over.
2- 19. Hand-Carried Fording
a. No special lubricaion is required before fording.
b. Protect from water splashes.
c. If immersion does occur, proceed as directed in paragraph 2-20.
Maintenance After Immersion
a. General. During hand-carried fording, water seepage into bolt, trigger housing, receiver,
2-20.
and operating rod assembly will usually occur. It is advisable, therefore, that the service outlined below be accomplished on all weapons submerged in water as soon as practical to prevent
damage to the weapon.
b. Procedures.
(1) After submersion in salt water, wash in clear water to remove corrosive salts.
(2) Drain all trapped moisture and wipe dry.
(3) Assemblies which require disassembly for proper lubrication must be disassembled, dried,
and lubricated as soon as possible.
Note. Items not authorized for operator disassembly/assembly
tional maintenance personnel.
CARTRIDGE
BARREL
AND
RECEIVER
must be cleaned by organiza-
CLIP-
GROUP-
-TRIGGER
AND
HOUSING
GROUP
Figure 13. U.S. Rifle, Caliber .30, M I. Major assembly group.
18
TM901005-222-12
Chapter
3
SERVICE AND MAINTENANCE
INSTRUCTIONS
Section I. Service Upon Receipt of Materiel
3- 1. General
a. When a new or reconditioned Rifle, Ml, MlC (Sniper’s) or MlD (Sniper’s) is received,
it is the responsibility of the officer in charge to determine whether the materiel has been
properly prepared for service by the supplying organization and to be sure it is in condition to
perform its function.
b. All basic issue items will be checked with the listing in appendix B.
c. A record will be made of all missing parts, tools, and equipment, and of any malfunctions.
Corrective action should be initiated as soon as possible.
3.2. Services
Refer to table 3-1 for services performed
on receipt
of materiel.
Table 3-l. Service upon Receipt of materiel
Reference
Action
Step
RIFLES
Note. When new rifles are received, they are sealed in
vapor proof, volatile corrosion inhibitor (VCI) bags.
They are packed two in a carton and five cartons in a
box.
1
Remove
2
Check for missing items.
Note. Items must agree with Basic issue items list.
APP B>
Set II
Clean
Par 3-lla
6
carton from box and rifle from carton
and lubricate
and bags.
bore and chamber.
Field strip and inspect for missing parts and
proper assembly.
FM 23-5
Clean and lubricate the following:
Locking lugs of bolt
Bolt guides
Camming surfaces of operating rod
Par 3-l la
and 3-6
Perform “before operation”
preventive maintenance checks
Table
and 3-6
3-3
and services.
Section II. REPAIR PARTS, SPECLAL TOOLS AND EQUIPMENT
3-3. Tools and Equipment
Tools and equipment issued with the Caliber .30 Rifles, Ml, MlC (Sniper’s) and MlD (Sniper’s)
are listed in the basic issue items list, appendix B.
34.
Special Tools and Equipment
Special tools and equipment are listed and illustrated
in appendix
3-5. Maintenance Repair Parts
Organizational maintenance
repair parts are listed and illustrated
19
B.
in appendix
B.
Section III. LUBRICATION
INSTRUCTIONS
3-6. ‘General
a. Make certain
all metal parts have been cleaned with SD, dry cleaning. solvent. Dry
thoroughly. Apply a light coat of preservative, PL special, general purpose lubricating oil, for
above OOF, and LAW, weapons lubricating oil, for below OOF. Apply a light coat of rifle grease
to the following surfaces:
(1) Locking lugs of bolt, operating lug, and recesses.
(2) Bolt guide.
(3) Cams on trigger and hammer.
b. Refer to table 3-2 for a listing of lubrication and cleaning materiels and stock numbers
for requisitioning purposes.
c. Refer to paragraph 2-16 thru 2-20 for specific lubrication
instructions under unusual
conditions.
Table 3-2. materiels Required for Maintenance
Functions
Item
Federal stock number
I
8020-244-0153
BRUSH,
7920-295-2491
exposed bristle
BRUSH, CLEANING,
ARTISTS:
metal, ferrule, flat, chisel edges,
TOOL
AND
PARTS:
rd, 100 percent
6850-965-2332
tampico fiber.
CARBON
REMOVING
COMPOUND:
(P-Clll)
CLEANING
COMPOUND,
RIFLE BORE: (CR)
6850-224-6656
2 oz. can
6850-224-6657
6850-224-6658
6 oz. can
1 qt. can
CLOTH, ABRASIVE:
5350-221-0872
cloth-backing,
7116 lg.
(5 gal. pail)
crocus, ferric oxide and quartz, jean-
closed-coating.
(CA)
6850-281-1985
DRY CLEANING
SOLVENT:
(SD) (1 gal can)
LUBRICATING
OIL, GENERAL
PURPOSE:
(PL special)
9150-273-2389
9150-231-6689
4 oz. can
1 qt. can
GREASE,
9150-754-0063
8010-221-0611
RIFLE:
(1 lb. can)
9150-292-9689
LINSEED OIL,
LUBRICATING
7920-205-1711
operations (1 qt. can)
RAG, WIPING:
cotton
Section IV.
I
RAW: (1 gal. can) (TT-L-00215)
OIL, WEAPONS:
(LAW) for below zero
(50 lb. bale)
PREVENTIVE MAINTENANCE
CHECKS AND SERVICES
Preventive Maintenance
a. Purpose. To assure maximum operational
3.7.
readiness the operator must perform certain
scheduled maintenance services at designated intervals. See basic preventive maintenance procedures (1) thru (3) under b below, and table 3-3.
b. Preventive Maintenance Performed by Operator.
(1) Rust, dirt, grit, gummed oil, and water cause rapid deterioration
of outer surfaces and
internal mechanisms. Exercise care to keep all surfaces clean and properly lubricated. Exterior
surfaces of the weapon (or components) are not to be cleaned or polished with treated cloths
or other commercial compounds.
(2) Tighten loose parts.
(3) Every six months check to see if all modifications have been applied. Refer to DA
Pam 310-7. No alteration or modification wiii be made except as authorized by ,modification
work order.
20
Table 3-3. Preventive maintenance Checks and Services
-
T
d
-i
1
Fi
-
2
I
operation
B--&fore
D-During
en
I.1
A-After operation
W-Weekly
operation
Item to be inspected
Procedure
Ml, MlC, MID
Hand cycle the action to insure binding is not
present.
_
Trigger housing assembly
Actuate safety. Safety will not engage when
hammer is forward.
Fig. 12
3
-
Barrel and receiver
Actuate windage knob and elevating
pinion of rear sight group for proper
operation. Aperture must retain position
against thumb pressure.
Fig. 12
4
-
Barrel and receiver
Check front sight for secure installation.
5
5
Ml, MIC, MlD
Check gas cylinder lock screw for
secure installation.
Do not tighten lock screw when
weapon is hot.
Note.
6
_
Ml, MlC, MlD
Clean chamber, tore, and all components.
Pat
3-lla
7
_
Ml, MlC, MlD
Lubricate.
Pat
3-6
-
Section V. TROUBLESHOOTING
3-8. General
Refer to table 34
for troubleshooting.
21
Table 3-4. Troubleshooting
CORRECTlVE ACTION
MALFUNCTION
PROBABLE CAUSE
Failure to load
Damaged clip
Improperly assembled receiver
components
Failure to feed
Weak or broken operating rod
spring
Binding or damaged operating rod
Bolt fails to close
Failure to fire
OPERATOR
1
ORGANIZATIONAL
Replace clip.
Disassemble, and reassemble
correctly (refer to FM 23-5).
Replace spring (2, fig. 36).
Evacuate to direct support
maintenance personnel.
Dirty or deformed ammunition
Cartridge case holding bolt out
of battery
Dirty chamber
Extractor does not snap over rim
of cartridge
Frozen ejector spring and plunger
Restricted movement of or
damaged operating rod
Weak or broken operating rod
spring
Damaged receiver
Clean or replace ammunition.
Pull bolt to the rear and remove
dirty or deformed cartridge.
Clean chamber (par 3-1 la).
Clean bolt assembly and extractor
recess (par 3-lla).
Bolt not in battery
Defective ammunition
See “bolt fails to close”.
Follow procedures for misfires
(refer to FM 23-5).
____.~c____._I~~~~_~~~~~~~~~~~~~~~~~..~~~-Replace firing pin (8, fig. 36 ).
Firing pin worn, damaged, or
movement restricted
Replace extractor (5, fig. 36).
Replace ejector (6, fig. 36 ).
Evacuate to direct support
maintenance personnel.
Replace spring (2, fig. 36 ).
____.._____________.1________________11_---
Evacuate to direct support
maintenance personnel.
Inadequate firing pin protrusion
Evacuate to direct support
maintenance personnel.
Weak or broken hammer spring
Replace hammer spring
(4, fig. 35).
Hammer damaged or broken
_____~~~______~~~~~~~~~~~~~~~~~~~r_~~~.~~~~~
Evacuate to direct support
maintenance personnel
Short recoil
Gas cylinder lock screw loose
Gas cylinder lock not fully seated
Tighten lock screw (15,fig. 36 ).
Tighten gas cylinder lock
(16, fig. 36 ).
Carbon or foreign matter in gas
cylinder or barrel port
Clean (par 3-l la).
Replace spring (2 fig. 36).
Remove and properly install
gas
cylinder (figs. 22, 23)
Defective operating rod spring
Gas cylinder not fully seated
Improper lubrication in cold
weather
Unserviceable gas cylinder
Unserviceable
Failure to extract
Clean and lubricate properly
(par 2-16).
Evacuate to direct support
maintenance personnel.
Evacuate to direct supportmaintenance personnel.
gas piston
Cartridge seized in chamber
Remove cartridge and clean
chamber (par 3-lla).
Replace extractor (5, fig. 36 ).
Remove cartridge case fig. 14 ).
Damaged or deformed extractor
Ruptured cartridge case
Failure to eject
Failure of bolt to be
held rearward after
last round is fired
Short recoil
Weak, frozen or distorted
ejector spring and plunger
See “short recoil”.
Insufficient rearward movement
of bolt
See “short recoil”.
Defective or broken operating
rod catch
Defective operating rod.
Failure of clip to eject Broken or deformed latch spring
Replace if necessary
(15, fig. 36).
Replace ejector (6, fig. 36 ).
Evacuate to direct support
maintenance personnel.
Evacuate to direct support
maintenance personnel.
Replace latch spring
(27, fig. 36).
EXTRACTOR
Figure 14. Removal of ruptured cartridge case.
Section VI. OPERATORS
MAINTENANCE
PROCEDURES
3-9. Removal/Installation
of Major Groups and Assemblies
Refer to FM 23-5. Also see fig. 13 and fig. 15.
3-10.
Disassembly/Assembly
Refer to FM 23-S.
Barrel and Receiver Group
Also see figs. 20 through 30.
3-11. Cleaning,
Inspection,
and Repair
a. Cleaning.
(1) General.
(a) Immediately after firing, thoroughly clean bore with a bore brush saturated with CR,
rifle bore cleaning compound.
(b) After cleaning with CR, run dry swabs thru the bore until the swabs are clean. Make
certain that no trace of burned powder or other foreign substances are left in bore. Then apply
a light coat of PL special, general purpose lubricating oil.
(c) Clean the chamber with a cleaning brush dipped in CR.
(d) Clean all surfaces exposed to powder fouling (bolt face, chamber, piston area of
operating rod assembly and gas cylinder lock screw) with CR.
Note.
This compound is not a lubricant.
Wipe dry and oil all parts which require lubrication.
CAUTION. The use of abrasives, steel wool, wire brushes, or scrapers on the piston area
of the operating rod assembly will change critical dimensions that may cause the weapon to
malfunction and is therefore prohibited. The application of lubricants to this area is also
prohibited.
(e) For general usage, SD, dry cleaning solvent, may be used to clean or wash grease
and oil from all parts of the rifle.
(2) General precautions in cleaning.
(a) SD, dry cleaning solvent, is flammable and should not be used near an open flame.
Have fire extinguishers available when using this material. This solvent evaporates quickly and
has a drying effect on the skin. If used without gloves it may cause cracks in the skin; in some
individuals, mild irritation or inflammation may bedevelop. Use only in well-ventiilated
areas.
(b) The use of gasoline, kerosene, bezene (benzol) or high-pressure water, steam, or air,
for cleaning the weapon is prohibited.
(c) Do not dilute CR, rifle bore cleaning compound. Do not add antifreeze. Store cleaner
in a warm place. Shake CR well before using.
(3) Cleaning of sling and scabbard. Cl ean mildewed canvas by scrubbing with a dry
brush. If water is necessary to remove dirt, it must not be used until mildew has been removed.
Oil and grease may be removed by scrubbing with issue soap and water. Rinse well with water
and dry.
CAUTION.
At no time is gasoline or any solvent to be used to remove oil or grease from
CanVaS.
24
To prevent mildew, air canvas items frequently.
(4) Cleaning. Clean with a dry cloth. Periodically rub raw linseed oil on wooden components to prevent drying or the absorption of moisture.
CAUTION.
Do not apply linseed oil to those surfaces next to the barrel. Application of
oil to these surfaces creates heavy smoking when the barrel is hot. This smoke will obscure the
operator’s vision. Portions which swell due to high moisture content should be dried before applying the linseed oil. Do not allow linseed oil to contact or remain on metal parts.
b. Inspection. Refer to paragraph 3-7.
c. Repair. Turn rifle into organizational maintenance personnel for any necessary repair.
Section VII. ORGANIZATIONAL
3-12. Removal/Installation
Refer to FM 23-5.
MAINTENANCE
PROCEDURES
of Major Groups and Assemblies
3-13. Disassembly/Assembly of Major Group and Assemblies
Refer to figures 15 through 30, 35, 36 and 41.
NOTE.
White dots indicate disassembly, and black dots indicate assembly.
3-14. Cleaning, Inspection,
and Repair
a. Cleaning.
(1) General. Refer to paragraph 3-1 la for general cleaning procedures.
(2) Removing carbon. On component parts which have a hard carbon residue it may be
necessary to clean these parts with P-C 111, carbon removing compound. Observe the following procedures when using P-C-1 11.
WARNING. Avoid contact of P-C-1 11 with skin. If contact does occur, wash compound
off thoroughly with running water. A good lanolin base cream is helpful if applied after washing
off compound. Recommend use of gloves and protective equipment.
(a)Using a suitable container, fill with fresh compound.
(b) Before soaking a component in compound, remove all grease, dirt and oil as indicated
in paragraph 3-lla. Place parts to be cleaned in a container and make certain they are
completely immersed.
(c) Soak for 2 to 16 hours as necessary. Remove parts and drain. Rinse with water or
solvent. To effectively remove carbon, brush with a stiff bristle brush (not wire) under running
water.
(d) Wipe parts dry and lubricate (par 3-6).
b. Inspection and Repair.
Refer to table 3-5.
NOTE. For items not authorized at organizational
support maintenance personnel.
Table 3-5. Organizational
Maintenance
maintenance
level, evacuate to direct
Functions
Warning: Before starting an inspection, be sure to
clean the weapon. Do not actuate the trigger until
the weapon has been cleared. Inspect the chamber
to insure that it is empty, and check to see that
no ammunition is in position to be introduced.
25
ITEM
Trigger
Stock
housing
INSPECTION
I
AND REPAIR
Inspect for and remove burs.
Replace items 1, 2, 4, 6, 8, and
or damaged.
assembly
10, Fig. 35, if worn
Inspect for cracks, breakage,
or damage
weaken the stock. Evacuate
to direct
maintenance
personnel.
assembly
Check for dry, unoiled areas of wood.
oil only. Do not oil inside of stock.
Make certain that
to the stock.
Barrel
and receiver
group
the butt
Inspect
barrel
Inspect
for and remove
plate
that would
support
Oil with
assembly
for rust or obstructions
rod assembly
group
Inspect for damage that may restrict
operating
rod assembly.
Replace
Inspect
Bolt assembly
item
is secure
in bore and remove.
burs.
Inspect chamber
for ruptured
cartridge.
ruptured
cartridge
case extractor.
Operating
raw linseed
2, fig 368, if weak,
for and remove
Remove
movement
broken,
with
the
of
or kinked.
burs.
Inspect firing pin. If chips or cracks
or if badly worn, replace.
are present
in tip area,
Inspect ejector and spring assembly hole for distortion,
burs or rust that would hinder free movement
of the
ejector assembly.
Follower
group
Gas cylinder
group
Replace
items
Replace
item
Inspect
front
, if worn or damaged.
, if worn or damaged.
5, 6, 7, and 8, fig 36
10, fig 36
sight.
make
sure it is secure.
Inspect gas cylinder lock screw.
not “frozen”
or cross-threaded
Replace
Handguard
group
items
15, 18, and
Inspect
Replace
group
19 fig 36,
Inspect for cracks that would impair
Replace items 20, 21, and 22, fig
Note. Evacuate
damaged
maintenance
personnel
Rear sight
Make sure it is tight,
in gas cylinder.
for damaged
item
27, fig
handguards
for repair.
if worn
but
or damaged.
serviceability.
36, if damaged.
to direct
support
parts.
36,
if worn
or damaged.
Inspect
for damaged
Inspect
Replace
windage knob and pinion for binding.
items 28, 29, and 30, fig 36, if worn
parts.
or damaged.
Raise the aperture
to full height and reduce by four clicks.
Grasp the rifle at the small of the stock with the thumb
on the aperture.
Press down on aperture.
Aperture
should
not move under thumb pressure.
Assembled
rifle
Hand
operate
to assure
26
proper
functioning.
;i
D
.
h
28
29
30
.
e
32
33
34
.
37
38