OVERVIEW:

The M4-89 is the premier fighting rifle we offer. It houses our combat grade barrel, A5 buffer system, Liberty Fighting Trigger, Ambi Liberty Charging Handle, ambi Quick Selector, and B5 furniture. At Sons of Liberty Gun Works, we always tell our customers that it’s not what a rifle company tells you, it’s what they don’t tell you. Below you will find the complete specifications of the M4-89. We have built our guns to run through years of hard use, and we have nothing to hide.

see availability

Barrel Specs:

Barrel: Sons of Liberty Gun Works 4150CoMOV 1:7 MPI HPT Barrel

Barrel Steel: 4150 CrMoV (Chrome Moly Vanadium per MIL-B-11595E)

Barrel Finish: QPQ Corrosion Resistant Finish

Barrel Extension: QPQ coated M4 Feed Ramp Extension

Gun Specs:

9 position A5 Buffer System with Sprinco Green Spring

Quick Ambi Selector – Billet Steel, 50* rotation, Ambi, QPQ Finished

Liberty Charging Handle with high gas shelf (ambi)

Liberty Fighting Trigger

Steel M89/DriveLock barrel nut

OVERVIEW:

The M4-89 is the premier fighting rifle we offer. It houses our combat grade barrel, A5 buffer system, Liberty Fighting Trigger, Ambi Liberty Charging Handle, ambi Quick Selector, and B5 furniture. At Sons of Liberty Gun Works, we always tell our customers that it’s not what a rifle company tells you, it’s what they don’t tell you. Below you will find the complete specifications of the M4-89. We have built our guns to run through years of hard use, and we have nothing to hide.

see availability

Barrel Specs:

Barrel: Sons of Liberty Gun Works 4150CoMOV 1:7 MPI HPT Barrel

Barrel Steel: 4150 CrMoV (Chrome Moly Vanadium per MIL-B-11595E)

Barrel Finish: QPQ Corrosion Resistant Finish

Barrel Extension: QPQ coated M4 Feed Ramp Extension

Gun Specs:

9 position A5 Buffer System with Sprinco Green Spring

Quick Ambi Selector – Billet Steel, 50* rotation, Ambi, QPQ Finished

Liberty Charging Handle with high gas shelf (ambi)

Liberty Fighting Trigger

Steel M89/DriveLock barrel nut

OVERVIEW:

The M4-89 is the premier fighting rifle we offer. It houses our combat grade barrel, A5 buffer system, Liberty Fighting Trigger, Ambi Liberty Charging Handle, ambi Quick Selector, and B5 furniture. At Sons of Liberty Gun Works, we always tell our customers that it’s not what a rifle company tells you, it’s what they don’t tell you. Below you will find the complete specifications of the M4-89. We have built our guns to run through years of hard use, and we have nothing to hide.

see availability

Barrel Specs:

Barrel: Sons of Liberty Gun Works 4150CoMOV 1:7 MPI HPT Barrel

Barrel Steel: 4150 CrMoV (Chrome Moly Vanadium per MIL-B-11595E)

Barrel Finish: QPQ Corrosion Resistant Finish

Barrel Extension: QPQ coated M4 Feed Ramp Extension

Gun Specs:

9 position A5 Buffer System with Sprinco Green Spring

Quick Ambi Selector – Billet Steel, 50* rotation, Ambi, QPQ Finished

Liberty Charging Handle with high gas shelf (ambi)

Liberty Fighting Trigger

Steel M89/DriveLock barrel nut

bARREL LENGTHS

10.5″
5.56 (Carbine Gas System with A2 muzzle device & B5 Stock or No Brace)

11.5″
5.56 (Carbine Gas System with A2 muzzle device & B5 Stock or No Brace)

12.5″
5.56 (Carbine Gas System with A2 muzzle device & B5 Stock or No Brace)

13.7″
5.56 (Midlength Gas System with P/W NOX, HUXWRX FH, or ASR mount & B5 Stock)

14.5″
5.56 (Midlength Gas System with P/W NOX, HUXWRX FH, or ASR mount & B5 Stock)

 

16″
5.56 (Midlength Gas System with A2 muzzle device & B5 Stock)

16″
.223 Wylde SPR (Midlength Gas System with NOX & B5 Stock)

18″
.223 Wylde (Rifle Gas System with NOX & B5 Stock)

13.9″
Match 6.5 Grendel (Midlength Gas System with NOX & B5 Stock)

18″
Match 6.5 Grendel (Rifle Gas System with A2 & B5 Stock)

18″
Match 6MM ARC (Rifle Gas System with A2 & B5 Stock)

9″
300BLK (Pistol Gas System with A2 muzzle device & Brace)

10.5″
300BLK (Pistol Gas System with A2 muzzle device & Brace)

13.9″
300BLK (Pistol Gas System with A2 muzzle device & B5 Stock)

BARREL LENGTHS

9″
300BLK (Pistol Gas System with A2 muzzle device & No Brace)

10.5″
300BLK (Pistol Gas System with A2 muzzle device & No Brace)

 

13.9″
300BLK (Pistol Gas System with P/W NOX muzzle device & B5 Stock)

10.5″
5.56 (Carbine Gas System with A2 muzzle device & B5 Stock or No Brace)

11.5″
5.56 (Carbine Gas System with A2 muzzle device & B5 Stock or No Brace)

13.7″
5.56 (Midlength Gas System with P/W NOX, HUXWRX FH, or ASR mount & B5 Stock)

14.5″
5.56 (Midlength Gas System with P/W NOX, HUXWRX FH, or ASR Mount & B5 Stock)

16″
5.56 (Midlength Gas System with A2 muzzle device & B5 Stock)

16″
.223 Wylde SPR (Midlength Gas System with NOX & B5 Stock)

18″
.223 Wylde SPR (Rifle Gas System with NOX & B5 Stock)

 

13.9″
6.5 Grendel SPR (Midlength Gas System with P/W NOX & B5 Stock)

 

18″
6.5 Grendel SPR (Rifle Gas System with NOX & B5 Stock)

 

18″
6MM ARC SPR (Rifle Gas System with A2 & B5 Stock)

 

bARREL LENGTHS

9″
300BLK (Pistol Gas System with A2 muzzle device & Brace)

10.5″
300BLK (Pistol Gas System with A2 muzzle device & Brace)

13.9″
300BLK (Pistol Gas System with A2 muzzle device & B5 Stock)

10.5″
5.56 (Carbine Gas System with A2 muzzle device & B5 Stock or No Brace)

11.5″
5.56 (Carbine Gas System with A2 muzzle device & B5 Stock or No Brace)

12.5″
5.56 (Carbine Gas System with A2 muzzle device & B5 Stock or No Brace)

13.7″
5.56 (Midlength Gas System with P/W Nox, HUXWRX FH, or ASR & B5 Stock)

14.5″
5.56 (Midlength Gas System with P/W NOX, HUXWRX FH, or ASR & B5 Stock)

16″
5.56 (Midlength Gas System with A2 muzzle device & B5 Stock)

16″
.223 Wylde SPR (Midlength Gas System with A2 & B5 Stock)

 

18″
.223 Wylde (Rifle Gas System with A2 & B5 Stock)

 

13.9″
6.5 Grendel SPR (Midlength Gas System with P/W NOX & B5 Stock)

 

18″
Match 6.5 Grendel (Rifle Gas System with A2 & B5 Stock)

18″
Match 6MM ARC (Rifle Gas System with A2 & B5 Stock)

m4 line up:

m4 line up:

m4 line up: