Build Better With Brownells & Save 15% On $250+ Parts Order w/ Code: BUILDBETTER

Build Better With Brownells & Save 15% On $250+ Parts Order w/ Code: BUILDBETTER

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SONS OF LIBERTY GUN WORKS M4-89 5.56X45MM NATO RIFLE

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Made In The U.S.A.

Products marked with the Stars and Stripes are proudly made in the U.S.A.

Many customers have asked us to show which products are made in America, and we’ve begun working with our vendors to identify them. This information, however, is not available for all items nor does it imply that foreign merchandise is of lesser quality. We will continue to gather this information to assist our customers in making informed buying decisions, and will keep our website current with the latest information.

Guaranteed. Forever.®

We make purchasing and returning products as simple as possible. If you buy a product from Brownells and decide you don’t need it, don’t want it, or just don’t like it, we’ll take it back any time… with a few exceptions

Exceptions include: 

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  • Products that are subject to pending or implemented restrictions due to Federal, State, or Local regulation/legislation

All other products are Guaranteed. Forever.® you can easily identify these products by the Guaranteed. Forever.® Icon.

Guaranteed. Forever.

Guaranteed. Forever.® return policy applies to the product’s original owner along with proof of purchase. Any items returned within 45 days of shipment are entitled to a refund. Any items returned after 45 days of shipment will be issued store credit in the form of a Brownells Gift Card. If a Brownells/Sinclair product was purchased through another retailer as a new product we will require proof of purchase to replace or refund.  (Refund will be issued as store credit in the form of a Brownells gift card.)  

The M4-89 is one of the premier fighting rifles we offer. It houses a combat grade barrel, A5 buffer system, Liberty Fighting Trigger, 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 M4-76. We have built our guns to run through years of hard use, and we have nothing to hide.
Barrel: Sons of Liberty Gun Works 4150CoMOV 1:7 MPI HPT Barrel
Barrel Steel: 4150 CrMoV (Chrome Moly Vanadium per MIL-B-11595E)
Twist Rate: 1/7 Twist Six Groove
Thread Pitch: 1/2-28 Threaded Muzzle
Gas Block: .750″ Gas Block Journal with appropriately sized gas port
Barrel Finish: QPQ Corrosion Resistant Finish
Barrel Extension: QPQ coated M4 Feed Ramp Extension
High Pressure (proof) Tested (HPT)
Magnetic Particle Inspected (MPI)
Specifications

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Restriction

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M4-89 5.56X45MM NATO RIFLE Reviews
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8 Questions
P
P
Pat
November 07, 2023
Is the 14.5 pinned? Otherwise isnt this an sbr
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I
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Isaac W.Company Answer
November 08, 2023

Both 13.7 and 14.5 are pinned.

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10
B
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B Stewart
November 04, 2023
This is an answer to the incorrect info posted in other answers here regarding muzzle devices: 13.7" has a nox flash hider (keymo) pin/welded. 14.5"/16" come with A2 flash hider.
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20
C
C
Customer CareCompany Answer
November 08, 2023

Thanks for the info.

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D
Daniel
October 30, 2023
Does the 14.5 come with the A2 or the NOX muzzle device? When I run the upc (785939518849) it comes up a ls the NOX? I would just like some clarification before I order.
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C
C
Customer careCompany Answer
February 16, 2024

The 13.7" and the 14.5" come with the NOX muzzle device, and the 16" has an A2 muzzle device.

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A
A
Angel G Ortiz
October 27, 2023
Does it have the NOX Muzzle device? Someone answered A2, but SOLGW shows it should be the NOX Muzzle device. Please clarify.
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10
C
C
Customer CareCompany Answer
October 31, 2023

I am sorry, we are unable to answer that, you will need to contact the manufacturer for that information.

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01
K
K
Kev
August 05, 2023
Is the muzzle device koymod for Dead Air?
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10
J
J
JamesCompany Answer
August 08, 2023

No. This comes with the standard A2 muzzle devise.

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04
J
J
Joe
May 07, 2023
Listing spec says muzzle brake. A couple pics show a flash hider & one shows the brake. Which is it? Also, if it ships wish FH, "right hand ported"? Or neutral porting? Thanks
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01
J
J
James DominoCompany Answer
June 08, 2023

This comes with the standard A2 muzzle devise.

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03
E
E
Ed
March 13, 2023
whats the overall weight of this rifle with a 13.7" barrel
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20
C
C
Customer CareCompany Answer
March 13, 2023

Weight (lbs):6.600

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11
O
O
Odyssey Sea
February 19, 2023
Dose this come with a mag and if so what captivate?
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02
G
G
GunsmithCompany Answer
February 20, 2023

Magazine Quantity:1

Cartridge Capacity:30

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30