M2 .50 Cal Parts Diagram Retracting Slide

Cartridge stop for blank ammo is different (longer) than cartridge stop for live ammo. Ensure cartridge stop is changed when firing blank or live ammo.

Check if front cartridge stop (1) (RH feed)/front cartridge stop (1) (LH feed) is broken, tight fitting, or incorrectly assembled.

Check if link stripper (2) (RH feed only) is broken, tight fitting, or incorrectly assembled.

Check if rear cartridge stop (3) (RH feed only)/rear cartridge stop assembly (4) (LH feed only) is broken, tight fitting, or incorrectly assembled.

Check for broken or missing pin (5), safety wire (6), or cotter pin (7).

Cartridge Stop Rear

Either front cartridge stop is broken, tight fitting, or incorrectly assembled.

RH feed link stripper is broken, tight fitting, or incorrectly assembled.

Rear cartridge stop is broken, tight fitting, or incorrectly assembled.

Pin, safety wire, or cotter pin is broken or missing.

Table 1. Unit Preventive Maintenance Checks and Services for Machine Gun, M2 - Continued.

ITEM NO.

INTERVAL

BE CHECKED

OR SERVICED

PROCEDURE

EQUIPMENT NOT READY/AVAILABLE IF:

14

Quarterly

Retracting

Check bolt stud (1) for burrs

Bolt stud is burred or

Slide

or breaks.

broken.

Assembly

(Flex Only)

Check retracting slide handle

Retracting slide handle

(2) and spring (3) for cracks.

or spring is cracked; or

Check for spring tension and

has improper spring

proper assembly.

tension or assembly.

Retracting

Check retracting slide (4) for

Retracting slide is

Slide

burrs and binding in bracket

burred or binds.

(5).

Cotter Pins

Check for missing or broken

Cotter pins are missing

cotter pins (6).

or broken.

Bolt Charger Stud Assembly

Shoulder Pin

Check for loose or broken shoulder pin (7), stud (8), or shoulder screw (9).

Shoulder pin, stud, or shoulder screw is loose or broken.

Table 1. Unit Preventive Maintenance Checks and Services for Machine Gun, M2 - Continued.

ITEM

INTERVAL

MAN-

ITEM TO

EQUIPMENT NOT

NO.

HOURS

BE

PROCEDURE

READY/AVAILABLE

CHECKED

IF:

OR

SERVICED

14

Quarterly

Retracting

(Cont)

(Cont)

Slide

Assembly

(Flex Only)

(Cont)

Safety Wire

Check for broken or missing

Safety wires are broken

safety wires (10).

or missing.

Plunger

Check plunger (11) for proper

Plunger is broken,

assembly with bracket (5) and

missing, or incorrectly

spring (12). Check for spring

assembled. Spring is

pressure when plunger is

collapsed.

depressed. Check for

collapsed spring.

Machine Gun Diagram
Table 1. Unit Preventive Maintenance Checks and Services for Machine Gun, M2 - Continued.

ITEM NO.

INTERVAL

BE CHECKED

OR SERVICED

PROCEDURE

EQUIPMENT NOT READY/AVAILABLE IF:

15

Quarterly

Procedure applies to all configurations of barrel support.

Check barrel support (1) for burrs, cracks, or looseness.

2NE049

Barrel support is burred, cracked, or loose.

Table 1. Unit Preventive Maintenance Checks and Services for Machine Gun, M2 - Continued.

ITEM

INTERVAL

MAN-

ITEM TO

EQUIPMENT NOT

NO.

HOURS

BE

PROCEDURE

READY/AVAILABLE

CHECKED

IF:

OR

SERVICED

15

Quarterly

Receiver

(Cont)

(Cont)

Assembly

(Cont)

Extractor

Check extractor switch (2) for

Extractor switch is

Switch

spring tension and incorrect

improperly installed; or

installation and presence of

has a weak or missing

cotter pin. Check extractor

spring; or cotter pin is

switch for looseness.

missing. Extractor

switch is loose.

Bolt Latch

Check bolt latch (3) for spring

Bolt latch binds or bolt

tension and freedom of

latch bolt catch has

movement. Check bolt latch

rounded edges.

bolt catch for rounded edges.

Breechlock

Check breechlock cam (4) for

Cam does not move or

Cam

up and down movement. Cam

has wear in channel

MUST have minimal

(rail) area.

movement. Check cam for

wear in channel (rail) area.

Safety Wire

Check for safety wire (5)

Safety wire is missing.

through slotted nut and flat

spring (flex only).

Cotter Pin

Check for cotter pin (6)

Cotter pin is missing.

through slotted nut (M48

only).

Table 1. Unit and Direct Support Preventive Maintenance Checks and Services for

Machine Gun, M2 - Continued.

Table 1. Unit and Direct Support Preventive Maintenance Checks and Services for

Machine Gun, M2 - Continued.

ITEM NO.

INTERVAL

BE CHECKED

OR SERVICED

PROCEDURE

EQUIPMENT NOT READY/AVAILABLE IF:

15 (Cont)

Quarterly (Cont)

Assembly

(Cont)

Cal Machinegun Diagram

CHANNEL AREA

ROUNDED EDGES

CHANNEL AREA

ROUNDED EDGES

M10 Manual Charger

Receiver

Check slot where M10 manual charger is mounted on left side of receiver, where bolt stud moves forward and back, for wear.

Check receiver for cracks/ movement of riveted parts. Check for loose rivets. If rivets are loose, send to Direct Support Maintenance.

Upper part of slot is worn.

Receiver is cracked or there is movement of riveted parts; rivets are loose.

Table 1. Unit Preventive Maintenance Checks and Services for Machine Gun, M2 - Continued.

ITEM

INTERVAL

MAN-

ITEM TO

EQUIPMENT NOT

NO.

HOURS

BE

PROCEDURE

READY/AVAILABLE

CHECKED

IF:

OR

SERVICED

16

Quarterly

M10 Manual

Check channel housing (1) for

Channel housing is

Charger

dents, twists, or cracks.

dented, twisted, or

(M48 Only)

cracked.

Charger Bolt

Check charger bolt cover (2)

Charger bolt cover is

for dents, twists, or cracks.

dented, twisted, or

cracked.

Swivel

Check swivel pulley plate (3)

Swivel pulley plate is

Pulley

for damage.

damaged.

Charger

Check charger cable assembly

Strands are broken; or

Cable

(4) for broken strands; or if

cable is kinked (enough

Assembly

cable is kinked, twisted, or

to adversely affect

missing.

smooth operation),

twisted, or missing.

Swivel and

Check swivel (5) and pulley

Swivel or pulley is

Pulley

(6) for burrs and binding.

burred or is binding.

Safety Wire

Check for broken or missing

Safety wires are broken

safety wires (7).

or missing.

Semi Auto Shotgun Diagram

Table 1. Unit Preventive Maintenance Checks and Services for Machine Gun, M2 - Continued.

ITEM NO.

INTERVAL

MAN-HOURS

ITEM TO

BE CHECKED

OR SERVICED

PROCEDURE

EQUIPMENT NOT READY/AVAILABLE IF:

Quarterly (Cont)

M10 Manual

Charger (M48 Only) (Cont)

M10 Manual

Charger

Charger

Check for looseness (when mounted on gun).

Check M10 charger for proper functioning. Ensure slide lock pawl and lock selector is functioning properly.

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