M14 Front Sight

REJECT LIMIT 0.310

'GAGE READINGS

»

*

m

)

(

cd

c

n

ci

»

Figure 3-10. Gaging of breeehbort.

WE 10109

Figure 3-10. Gaging of breeehbort.

M14 Front Sight

A, INSERTING ALIGNMENT s TOOL IN FLASH SUPPRESSOR ' AND BARREL IORE.

TabU 3-11. Procedure lor checking alignment of flash tuppresior using alignment tool 7799705.

A, INSERTING ALIGNMENT s TOOL IN FLASH SUPPRESSOR ' AND BARREL IORE.

C. FLASH SUPPRESSOR ALIGNED WITH BARREL BORE.

WE 15518

C. FLASH SUPPRESSOR ALIGNED WITH BARREL BORE.

WE 15518

TabU 3-11. Procedure lor checking alignment of flash tuppresior using alignment tool 7799705.

.muzzle end

'BARREL

A INSERTING BARREL PILOT . IN MUZZLE END Of BARREL

.muzzle end

'BARREL

A INSERTING BARREL PILOT . IN MUZZLE END Of BARREL

BARREL

B FACING MUZZLE ÉNO Of BARREL

BARREL

B FACING MUZZLE ÉNO Of BARREL

MUZZLE END

barrel cleaning cloth

MUZZLE END

barrel

C CLEANING MUZZLE END

! SUPPRESSOR PILOT

! SUPPRESSOR PILOT

FLASH

SUPPRESSOR1

D INSERTING FLASH SUPPRESSOR PILOT IN MUZZLE END OF FLASH SUPPRESSOR

ine emery; disk ;

uzzle]

FLASH

SUPPRESSOR1

D INSERTING FLASH SUPPRESSOR PILOT IN MUZZLE END OF FLASH SUPPRESSOR

Suppressor Alignment Gauge

FLASH SUPPRESSOR.

! MUZZLE

TFACTnG FLASH SUPPRESSOR MUZZLE SEAT

FLASH SUPPRESSOR.

Flash Hider Removal M14a1

Figure S-1S. Procedure for using improvised barrel facing and /lash suppressor muzzle seat tool.

NOT-GO PLUG GAGE

Gage Headspace 7274790

NOT-GO PLUG GAGE

GAS CYLINDER

WE J5549.

Figure 3-13. C ht eking diameter of piéton hole ttt gas cylinder using piston notr-go plug gage 787+758.

GAS CYLINDER

WE J5549.

Figure 3-13. C ht eking diameter of piéton hole ttt gas cylinder using piston notr-go plug gage 787+758.

DIAMETER OF GAS PISTON.
M14a1 Bipod MarkingsM14 Assault Rifle Gas Piston Tolerance

Figure 3-U. Cheeking diameter of gas piston-critioal areas.

Figure 3-U. Cheeking diameter of gas piston-critioal areas.

7790833 Bipod Rifle

Step

IMPROVISED PUNCH RECEIVER'

Step

IMPROVISED PUNCH RECEIVER'

bWE 92I8A

Figure 3-/5. Removing retaining pin from boit lock using improvised bolt lock retaining pin punch.

3-13. Gaging Headspace a. Headspace is measured in a rifle as the distance between the shoulder of the chamber and the face of bolt when the bolt is in a locked position. Headspace is important both for safety and for operation. Excessive headspace will cause a ruptured cartridge, allowing gas to enter the receiver» which may damage the rifle or injure personnel.

b. For procedures on gaging headspace on rifles refer to table 3-10.

Table 3-10. Procedure on Caging Headspace

Step

Procedure

Remove operating rod assembly.

Clean barrel chamber, headspace gags, bolt and receiver.

Insert field rejection headepace gage

7274790 (fig. 3-16) into chamber and position it to cartridge ejector enters the clearance cut on the base of the headspace gage.

Move bolt forward.

Result

To avoid Interference with free movement of bolt.

To ascsrtaln a rsadlng.

Note. In making head-space test, the bolt should never be forced, but should be "felt"» using only the slightest finger tip pressure.

The bolt should not close.

Procedure

Remove bolt assembly.

Insert field test gage bolt 7274799 (fig. 3-16) into receiver.

Insert headspace gage Into face of field test bolt.

Move the bolt forward.

Result

Note. If bolt does close, test rifle with field test bolt, continue with steps 5 thru 8.

If the field test gage bolt does not close, the original rifle bolt Is worn and must be replaced. If the field test gage bolt does close on the head-space, the rifle will be withdrawn from service and the barrel and receiver declared unserviceable.

HEAD5PACE GAGE -7274790 1.6455 INCH

Fff 10 TEST GAGE SOLI - 7274799

HEAD5PACE GAGE -7274790 1.6455 INCH

Fff 10 TEST GAGE SOLI - 7274799

Figure 3-16. Gaging headspace.

•OIT ASSY-7790187

Figure 3-16. Gaging headspace.

3-14. Correction of Loose Flront Sight a. The procedure for correcting a loose front sight is as follows:

(1) Remove front sight from weapon and completely remove screw from sight.

(2) Place a piece of 0.040 shim stock in slot at base of sight and place in vise (using lead, copper or brass jaws to prevent marking the sight) tighten until shim stock cannot be removed.

(3) Replace screw and reassemble front sight to tenon on flash suppressor. (It may be necessary to use a block of wood and hammer to reset the sight). Zeroing by boreslght method should be accomplished at this time. (See b below.)

(4) After zeroing, and before tightening, remove screw and apply sealing compound 8030-081-2326 to screw. Tighten screw with socket head screw key GGG-W-00652.

Not*. Usually this 1» a one-time occurence; bow-avar, if eome degree of care la not maintained, than r« occur a nee la almost a certainty.

6. The rear sight shall be set at zero windage, the aperture elevated eight clicks from the lowest position, and the rifle sights aligned at 6 o'clock on the sighting image of a known target or stationary object. The front sight shall not be filed or bent, but may be moved as necessaiy provided that It does not overhang the tenon on the flash suppressor. Upon satisfactory completion of the targeting, the front sight shall be locked in place by the front sight screw, and the rear sight elevating knob shall be set at the 100 meter graduation mark when the aperture Is elevated eight clicks from the lowest position.

Section X. MAINTENANCE OF RIFLE BIPOD M2

3-15. General M14A1 Rifle must contain the swivel.

a. Bipods for the M14 Rifle can be utilized b. Refer to table 3-11. with or without the swivel. Bipods for the

Table 3-11. Guide to Maintenance Function

Item

Remous// Installation

Disassembly /assembly

Cleaning and repair

Teste and adjust ment t

Rifle Bipod M2 Plunger buttons end plungers. Springs

Leg assemblies

Yoke assembly

3 and 14, flg. B-10 17, fig. B-10

Para 3-2. Para 3-1 and 3-2. Para 3-1 and 3*2.

0 0

Responses

  • carol
    How to use the m1a flash hider alignment tool?
    6 years ago

Post a comment