Code 4 Law Enforcement Sales & Service
Repair Parts for AR-15 and M16 Rifles



We stock individual AR-15 and M16 parts as well as 
complete parts kits. 

Please 
contact us for current pricing and availability.



 


Lower Receiver Diagram











Lower Receiver Parts List


Ref.

Item Description

Model

Part Number

Price

1

BOLT CATCH

For .223 & 7.62 X 39 Models

SP62301

 

1

BOLT CATCH

For 9mm Models

SP62835

 

2

BOLT CATCH PIN

All Models

SP95105

 

3

BOLT CATCH PLUNGER

All Models

SP62178

 

4

BOLT CATCH SPRING

All Models

SP62177

 

5

BUFFER RETAINER

All Models

SP61582

 

6

BUFFER RETAINER SPRING

All Models

SP61694

 

7

MAGAZINE CATCH

All Models

SP61604

 

8

FIRE CONTROL SELECTOR

All Models

SP63000

 

9

TAKEDOWN PIN DETENT SPRING

All Models

SP61692

 

10

TAKEDOWN PIN DETENT

All Models

SP61698

 

11A

RECEIVER PIVOT PIN SCREW

All Models

SP66819

 

11

RECEIVER PIVOT PIN

All Models

SP66818

 

12

MAGAZINE RELEASE BUTTON

All Models

SP62032

 

13

MAGAZINE RELEASE BUTTON SPRING

All Models

SP61759

 

14

TRIGGER GUARD PIVOT PIN

All Models

SP95106

 

15

TAKEDOWN PIN

All Models

SP61655

 

16

TRIGGER GUARD ASSEMBLY

All Models

SP61970

 

17

TRIGGER GUARD PIN

All Models

SP95101

     

18

TRIGGER GUARD SPRING

All Models

SP61531

 

19

TRIGGER GUARD PLUNGER

All Models

SP61250

 

20

FIRE CONTROL SELECTOR DETENT

All Models

SP61785

 

21

FIRE CONTROL SELECTOR SPRING

All Models

SP61569

 

22

PISTOL GRIP

All Models

SP64576

 

23

PISTOL GRIP LOCK WASHER

All Models

SP90001

 

24

PISTOL GRIP SCREW

All Models

SP92701

 

25

ACCU -WEDGE

Models MT6830, MT6700, AR6830, AR6700

SP99009

 

26

FRONT ADAPTER ASSEMBLY**

9mm Models-Factory Installed Only

**

 

27

REAR ADAPTER ASSEMBLY**

9mm Models-Factory Installed Only

**

 

28

REAR MAGAZINE ADAPTER**

9mm Models-Factory Installed Only

**

 

29

EJECTOR

For 9mm Models Only

SP62830

 

30

REAR MAGAZINE ADAPTER PIN**

9mm Models-Factory Installed Only

**

 

31

MAGAZINE ADAPTER SPRING**

9mm Models-Factory Installed Only

**

 

32

MAGAZINE ADAPTER PIN**

9mm Models-Factory Installed Only

**

 


Pricing and specifications subject to change without notice







Fire Control Diagram






Fire Control Parts List


Ref

Item Description

Model

Part Number

Price

1

PIN , HAMMER & TRIGGER

Large Diameter .170

SP63158

 

Not Shown

PIN , HAMMER & TRIGGER

Small Diameter .155

 

 

Not Shown

PIN , HAMMER & TRIGGER, Stainless Steel

Small Diameter .155

 

 

2

HAMMER & HAMMER PIN RETAINER ASSY, .170, SEMI (Current)

FOR .223 & 7.62 X 39 MODELS, Large Diameter (.170)

SP63165

Not Shown

HAMMER & HAMMER PIN RETAINER ASSY, .170, SEMI, 9mm

For 9mm Models

SP62865

Not Shown

HAMMER & HAMMER PIN RETAINER ASSY, .155, SEMI, 9mm (older models)

For older 9mm models w/ .155 pins

 

 

Not Shown

HAMMER & HAMMER PIN RETAINER ASSY, .155, AUTO

For .223 or 9mm

SP62317

Not Shown

HAMMER & HAMMER PIN RETAINER ASSY, .155, BURST & 4-WAY

For .223 or 9mm

SP64561

3

HAMMER SPRING, SEMI & AUTO

All Models

SP61697

Not Shown

HAMMER SPRING, BURST & 4-WAY

All Models

SP64558

4

DISCONNECTOR, .170, SEMI (current models)

Large Diameter .170

SP63157

Not Shown

DISCONNECTOR, .155, 4-WAY, (left/semi)

Small  Diameter .155

SP63716

Not Shown

DISCONNECTOR, .155, 4-WAY, (right/burst)

Small  Diameter .155

SP63715

Not Shown

DISCONNECTOR, .155, AUTO

Small  Diameter .155

SP62334

Not Shown

DISCONNECTOR, .155, BURST, (left/semi)

Small  Diameter .155

SP64567

Not Shown

DISCONNECTOR, .155, BURST, (right/burst)

Small  Diameter .155

SP64566

Not Shown

DISCONNECTOR, .155, SEMI

(older models)

Small  Diameter .155

SP63036

5

TRIGGER, SEMI

(current models)

Large Diameter .170

SP63156

Not Shown

TRIGGER, SEMI

 

Small  Diameter .155

SP63029

Not Shown

TRIGGER, AUTO

Small  Diameter .155

SP61955

Not Shown

TRIGGER, (0.155), BURST & 4-WAY

Small  Diameter .155

SP64641

6

DISCONNECT SPRING, AUTO, SEMI, BURST, (LEFT/SEMI) – Black Insert

All Models

SP63026

Not Shown

DISCONNECTOR SPRING, BURST, (RIGHT/BURST)

Small  Diameter .155

SP64568

Not Shown

DISCONNECTOR SPRING, SEMI, HEAVY DUTY

All Models

SA06001

7

TRIGGER SPRING

All Models

SP61657

Not Shown

PIN, HAMMER & TRIGGER

Diameter-1713 For CR Models

SP64225

 

Not Shown

 

 

 

 

Not Shown

 

 

 

 

Not Shown

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Pricing and specifications subject to change without notice








Upper Receiver Diagram








Upper Receiver Parts List


Ref

Item Description

Model

Part Number

Price

1

CHARGING HANDLE ASSY.

All Models

SP62290

 

2

CHARGING HANDLE LATCH PIN

All Models

SP95113

 

3

CHARGING HANDLE LATCH

All Models

SP62289

 

4

CHARGING HANDLE SPRING

All Models

SP61875

 

5

COVER HINGE PIN

All Models

SP61658

 

6

COVER HINGE PIN SNAP RING

All Models

SP90402

 

7

COVER SPRING

All Models

SP61518

 

8

EJECTION PORT COVER ASSY.

For .223 & 7.62 X 39 Models

SP64532

 

8

EJECTION PORT COVER ASSY.

For 9mm Models

SP62854

 

9

GAS DEFLECTOR

For 9mm Models

SP62851

 

10

GAS DEFLECTOR SPRING

For 9mm Models

SP62769

 

11

FORWARD ASSIST RETAINER PIN

For .223 & 7.62 X 39 Models

SP95126

 

12

FORWARD ASSIST SPRING

For .223 & 7.62 X 39 Models

SP62271

 

13

FORWARD ASSIST ASSY.

For .223 & 7.62 X 39 Models

SP64543

 

14

PAWL PIN

For .223 & 7.62 X 39 Models

SP95113

 

15

FORWARD ASSIST PAWL

For .223 & 7.62 X 39 Models

SP62269

 

16

PAWL DETENT

For .223 & 7.62 X 39 Models

SP62270

 

17

PAWL DETENT SPRING

For .223 & 7.62 X 39 Models

SP50381

 

18

PLUNGER ASSY.

For .223 & 7.62 X 39 Models

SP64541

 

19

UPPER RECEIVER

For AR6700 & MT6700 Models

SP64986

 

19

UPPER RECEIVER

.223 A2 Style Models

SP64512

 

19

UPPER RECEIVER

9mm Models

SP62908

 

19

UPPER RECEIVER

For AR6751, AR6731, MT6731 Models

SP63264

 

19

UPPER RECEIVER

For A2, 7.62 X 39 Models

SP64690

 


Pricing and specifications subject to change without notice









Bolt Carrier Assembly Diagram 








Bolt Carrier Assembly Parts List


Ref

Item Description

Model

Part Number

Price

1

FIRING PIN RETAINING PIN

All Models

SP62335

 

2

FIRING PIN

For 7.62 X 39 & .223 Models

SP62294

 

2

FIRING PIN

For 9mm Models

SP62805

 

3

CAM PIN

For 7.62 X 39 & .223 Models

SP61704

 

4

BOLT ASSEMBLY

For Models MT6551, MT6601, MT6700 & 6830, AR6551, AR6601, AR6700,CR6724

SP62116

 

4

BOLT ASSEMBLY

For 7.62 X 39 Models

SP66808

 

4

BOLT ASSEMBLY

For 9mm Models

SP62860

 

4

BOLT ASSEMBLY

For Models MT6530, MT6731, AR6520 & AR6530, AR6721, AR6731

SP62644

 

5

EXTRACTOR PIN

For .223 & 7.62 X 39 Models

SP61563

 

5

EXTRACTOR PIN

For 9mm Models

SP95217

 

6

EXTRACTOR

For .223 Models

SP61562

 

6

EXTRACTOR

For 7.62 X 39 Models

SP66810

 

6

EXTRACTOR

For 9mm Models

SP62808

 

7

EXTRACTOR SPRING ASSY.

For Models MT6551, MT6601, MT6700 & MT6830, AR6551, AR6601, AR6700,AR6830, MT6530, MT6731, AR6520, AR6530, AR6721, AR6731

SP62769

 

8

EJECTOR PIN

For .223 & 7.62 X 39 Models

SP95102

 

9

EJECTOR

For .223 & 7.62 X 39 Models

SP61564

 

10

EJECTOR SPRING

For .223 & 7.62 X 39 Models

SP61569

 

11

BOLT RING

For .223 & 7.62 X 39 Models

SP61540

 

12

KEY & BOLT CARRIER ASSY.

For .223 & 7.62 X 39 Models

SP63162

 

13

SOCKET HEAD CAP SCREW

All Models

SP92201

 

14

BOLT CARRIER KEY

For .223 & 7.62 X 39 Models

SP61547

 

15

BOLT KEY

For 9mm Models

SP62809

 

16

FIRING PIN SPRING

For 9mm Models

SP62806

 

16

FIRING PIN

For CR6724

SP63039

 


Pricing and specifications subject to change without notice










Barrel Assembly Diagram






Barrel Assembly Parts List
 

Ref

Item Description

Model

Part Number

Price

1

HANDGUARD ASSY
1-Pair

For Models MT6430, MT6530, MT6731, MT6830, AR6430, AR6450, AR6530,AR6721, AR6731, AR6830, AR6520

SP62381

 

1

HANDGUARD ASSY
1-Pair

For Models MT6551, MT6601, MT6700, AR6551, AR6601, AR6700

SP64508

 

2

GAS TUBE PIN

For All Models

SP95108

 

3

GAS TUBE ASSY

For Models MT6530, MT6731, MT6830, AR6520, AR6530, AR6721, AR6731,AR6830

SP62366

 

3

GAS TUBE ASSY

For Models MT6551, MT6601, MT6700, AR6551, AR6601, AR6700, CR6724

SP61645

 

4

BARREL NUT ASSY.

For All Models

SP62482

 

5

HANDGUN RETAINER RING

For All Models

SP90403

 

6

SLIP RING SPRING ASSY.

For All Models

SP61962

 

7

HANDGUARD SLIP RING

For All Models

SP62483

 

8

BARREL NUT

For All Models

SP61902

 


Pricing and specifications subject to change without notice







Rear Sight Diagram








Rear Sight Parts List
 

Ref

Item Description

Model

Part Number

Price

1

REAR SIGHT ASSY.

A2 Rifles

SP64521

 

1

REAR SIGHT ASSY.

Used on Separate Carrying Handle Assy., A2 Rifle

SP64985

 

2

INDEX SPRING

Adjustable Sight Models

SP64518

 

3 & 14

REAR SIGHT BALL

Adjustable Sight Models

SP64517

 

4

REAR SIGHT

Adjustable Sight Models

SP64524

 

4

REAR SIGHT

9mm Models

SP62816

 

5

WINDAGE SCREW

Adjustable Sight Models

SP64525

 

5

WINDAGE SCREW

9mm Models

SP61702

 

6

REAR SIGHT SPRING

All Models

SP64781

 

7

REAR SIGHT BASE

A2 Rifles

SP64523

 

7

REAR SIGHT BASE

Carry Handle Models

SP64977

 

8

WINDAGE DRUM PIN

Adjustable Sight Models

SP64522

 

8

WINDAGE DRUM PIN

9mm Models

SP95101

 

9

WINDAGE DRUM

9mm Models

SP61703

 

9

WINDAGE DRUM

Adjustable Sight Models

SP64526

 

10

ELEVATION KNOB

A2 Rifles

SP64516

 

10

ELEVATION KNOB

Carrying Handle Assy.

SP64981

 

11

ELEVATION INDEX

A2 Rifles

SP64515

 

11

ELEVATION INDEX

Carrying Handle Assy.

SP64980

 

12

INDEX SCREW

Adjustable Sight Models

SP64514

 

13

INDEX SPRING

A2 Rifles

SP64518

 

13

INDEX SPRING

Carrying Handle Assy.

SP64982

 

15

ELEVATION SPRING

Adjustable Sight Models

SP64519

 

16

REAR SIGHT PIN

Adjustable Sight Models

SP95126

 

A1

CARRYING HANDLE ASSY.

.223 Models

SP64987

 

A1

CARRYING HANDLE ASSY.

7.62 X 39 Models

SP63270

 

A3

CLAMP BAR

All Models

SP64080

 

A4

CLAMP NUT ASSY.

All Models

SP64984

 

A5

CLAMP STUD

All Models

SP64989

 

A6

CARRYING HANDLE PIN

All Models

SP64992

 


Pricing and specifications subject to change without notice






 

 

Fixed Buttstock Assembly Diagram







Fixed Buttstock Assembly Parts List


Ref

Item Description

Model

Part Number

Price

1

RECEIVER EXTENSION

All Models

SP61574

 

2

ACTION SPRING

All Models

SP61581

 

3

BUFFER ASSEMBLY

For Models MT6530, MT6551, MT6830, MT6731, MT6700, MT6601, AR6551,AR6830, AR6530, AR6700, AR6601

SP62339

 

Not Shown

BUFFER ASSEMBLY

AR6721

SP64688

 

3

BUFFER ASSEMBLY

For Models AR6430, MT6430

SP62877

 

4

BUTT CAP SCREW

A2 Buttstocks

SP64577

 

4

BUTT CAP SCREW

A1 Buttstocks

SP62601

 

5

BUTTSTOCK STOWAGE ASSY.

A2 Buttstock

SP64571

 

6

BUTTSTOCK

A2 Style

SP64574

 

7

BUTTSTOCK ASSEMBLY

All Models

SP64579

 

8

PLUNGER

All Models

SP64555

 

9

SPRING, PLUNGER

All Models

SP62732

 

10

DOOR

All Models

SP64556

 

11

PLUNGER RETAINER PIN

All Models

SP65102

 

12

BUTTSTOCK SPACER

A2 Stock Only

SP64578

 

13

HINGE

All Models

SP62736

 

14

HINGE PIN

All Models

SP62734

 

15

SWIVEL SCREW

All Models

SP64573

 

16

SWIVEL

All Models

SP62737

 

Not Shown

SWIVEL

For CR6724 Only

SP64216

 



Pricing and specifications subject to change without notice










Sliding Buttstock Assembly Diagram







Sliding Buttstock Assembly Parts List


Ref

Item Description

Model

Part Number

Price

1

BUFFER ASSEMBLY

For .223 Models

SP64688

 

1

BUFFER ASSEMBLY

For 9mm Models

SP62849

 

2

RECEIVER END PLATE

For Sliding Buttstock Assy.

SP62358

 

3

RECEIVER EXTENSION NUT

For Sliding Buttstock Assy.

SP64069

 

4

ACTION SPRING

For Sliding Buttstock Assy.

SP62373

 

5

RECEIVER EXTENSION

For Sliding Buttstock Assy.

SP64072

 

6

SLIDING BUTTSTOCK ASSY.

For Sliding Buttstock Assy.

SP64679

 

7

LOCK RELEASE LEVER PIN

For Sliding Buttstock Assy.

SP64687

 

8

LOCK RELEASE LEVER PIN SPRING

For Sliding Buttstock Assy.

SP62369

 

9

SLIDING BUTTSTOCK

For Sliding Buttstock Assy.

SP62629

 

10

RELEASE LEVER

For Sliding Buttstock Assy.

SP62628

 

11

LOCK PIN NUT

For Sliding Buttstock Assy.

SP64686

 

12

LOCK NUT PIN

For Sliding Buttstock Assy.

SP95142

 



Pricing and specifications subject to change without notice