About Sons of Liberty Gun Works
Sons of Liberty Gun Works was founded in 2012 with a straightforward philosophy: build an AR-15 that performs under real-world conditions, not just on a bench. SOLGW publishes full specifications for every rifle they produce, uses 7075-T6 aluminum forgings throughout, and backs every complete firearm with a lifetime warranty covering normal wear items including barrels, gas rings, and furniture. Their rifles are built in San Antonio and serve law enforcement officers, military units, and armed citizens across the country.
Sons of Liberty Gun Works Rifle Models
SOLGW builds a focused lineup of AR-15 platform rifles and pistols, each designed around a specific mission profile. Whether you're a patrol officer outfitting a duty rifle, a competitive shooter, or a homeowner building a capable home defense setup, there is a SOLGW configuration built for your use case.
SOLGW M4-EXO3
The M4-EXO3 is SOLGW's third-generation fighting rifle and their most widely deployed M4-pattern platform across law enforcement. It is built around a 4150 chrome moly vanadium barrel with a QPQ Nitride/Melonite finish, forged 7075-T6 upper receiver with M4 feed ramps, M16-pattern BCG, and a 13-inch free-floating M-LOK handguard. The Liberty Fighting Trigger ships with a consistent 5.5 to 6-pound pull and a Nickel Teflon coating. Standard furniture is B5 Systems throughout. The EXO3 is available in 11.5, 13.7, 14.5, and 16-inch barrel configurations, making it the most versatile M4-pattern option in the SOLGW lineup.
SOLGW M4 L89
The M4 L89 is SOLGW's longer-configuration M4-pattern rifle, purpose-built for shooters who need a full-length fighting platform with the SOLGW quality standard. It shares the same QPQ-finished CMV barrel, M16-pattern BCG, and M-LOK handguard construction as the EXO3 while offering a longer sight radius and improved ballistic performance from the extended barrel. The L89 designation reflects SOLGW's broadsword-style rail system integrated into this configuration.
SOLGW Mk1 CAR
The Mk1 CAR is SOLGW's next-generation fighting rifle and the platform USSOCOM selected for its Combat Assault Rifle program. It solves one of the fundamental limitations of standard M4-pattern AR-15 builds: flex between the upper receiver and handguard that allows optics and lasers to lose zero under field conditions. The Mk1's Drivelock system uses Broadsword-style machined tabs and recesses that lock the billet upper and rail together with minimal deflection, producing rail rigidity that standard M4-pattern designs cannot match.
The Mk1 CAR is built on a billet upper, lower, and rail receiver set with a continuous M1913 Picatinny top rail, 7-sided M-LOK slots, integrated cable routing, and laser-engraved texturing. The medium contour barrel uses 3-groove polygonal rifling with a titanium barrel nut coated for heat management and faster cooling between strings. The operating system runs an A5-length buffer system, NP3-coated BCG, Liberty 2-stage trigger, and ambidextrous Badger safety selector.
SOLGW Mk1 Recce
The Mk1 Recce extends the Mk1 platform into a longer-barreled configuration designed for precision-oriented applications where the Mk1's rail rigidity and billet construction deliver a meaningful advantage over standard M4-pattern precision builds. Built on the same Drivelock billet receiver set and Mk1 rail system with a longer barrel profile optimized for accuracy at extended ranges, it is the choice for shooters who want the Mk1's structural improvements in an SPR-style format.
SOLGW Components
SOLGW produces a line of standalone components for builders who want SOLGW-quality parts on custom AR-15 and M4-pattern builds. Available components include BCGs, handguards, barrels, charging handles, lower receivers, upper receivers, and trigger assemblies. The SOLGW NP3-coated BCG and Liberty triggers are particularly popular as drop-in upgrades to existing builds.
How to Choose the Right SOLGW Rifle
Sons of Liberty Gun Works builds every rifle to the same standard, so the primary decision comes down to intended use and configuration preference. Here are the key considerations to help you narrow it down.
For Duty and Law Enforcement Use
The M4-EXO3 is the most widely deployed SOLGW platform across law enforcement, with over 300 agencies in more than 30 states standardizing on it as their duty M4-pattern rifle. The 13.7-inch barrel pinned to 16 inches overall hits the balance between maneuverability and terminal performance on 5.56 NATO. For departments or officers who want a step further, the Mk1 CAR is the platform SOCOM selected and represents the current state of the art in short, suppressor-optimized fighting rifles. SOLGW's critical incident replacement program covers any SOLGW rifle lost or damaged in the line of duty at no charge.
For Home Defense and General Use
For home defense or a general-purpose AR-15, the 16-inch M4-EXO3 is the most practical configuration for most buyers. The free-floated M-LOK handguard provides plenty of attachment points for a light, pressure switch, or vertical grip without compromising the clean profile. SOLGW's lifetime warranty, covering wear items, means you buy once.
For Competition and Enthusiast Shooters
Enthusiast shooters who want a premium, competition-capable AR-15 should look closely at the Mk1 Recce. The Drivelock system holds zero on precision optics across extended firing sessions in a way standard M4-pattern uppers cannot, the longer barrel suits precision work at distance, and the sub-six-pound platform weight keeps it fast in dynamic scenarios. SOLGW publishes exact specs for every component, so you know precisely what you are buying and can build around it with confidence.
Sons of Liberty Gun Works FAQs
What makes Sons of Liberty Gun Works AR-15s different from other brands?
SOLGW differentiates itself through full specification transparency, a lifetime warranty covering every component including wear items, and a consistent track record of military and law enforcement adoption. Every rifle uses 7075-T6 aluminum forgings, QPQ-finished CMV barrels, and M16-pattern BCGs. The Mk1 platform specifically advances beyond standard M4 architecture with its Drivelock rail system, polygonal rifling, and titanium barrel nut. SOLGW also provides a no-cost critical incident replacement program for law enforcement officers.
Are SOLGW rifles mil-spec?
Yes, and the Mk1 exceeds it. All SOLGW rifles meet mil-spec standards, using Mil-Spec 7075-T6 forgings, M4 feed ramps, and M16-pattern bolt carriers. QPQ Nitride/Melonite barrel finishing exceeds basic mil-spec chrome lining in surface hardness and corrosion resistance. The Mk1 goes further with billet construction, polygonal rifling, and a ceramic-derived titanium barrel nut coating. In November 2025, USSOCOM selected the Mk1 under the Combat Assault Rifle program after extensive durability and environmental testing, confirming the platform meets the most demanding military standards in use today.
Does SOLGW offer a warranty and duty replacement program?
Yes. Every complete SOLGW firearm is backed by a lifetime unlimited warranty covering all components including normal wear items like barrels, gas rings, and furniture. SOLGW also provides a critical incident replacement policy: law enforcement officers whose SOLGW rifle is lost or damaged in the line of duty receive a replacement at no charge. These programs reflect a company that treats its products as working tools and stands behind them unconditionally.
How does the Mk1 improve on the standard M4 carbine?
The Mk1 addresses the M4 platform's primary structural limitation: flex at the upper-to-handguard junction that causes optics and accessories to shift under field conditions. The Drivelock system eliminates that flex using Broadsword-style machined tabs and recesses, locking the billet upper and rail with minimal deflection. Polygonal rifling provides greater ammunition tolerance and extended barrel life over standard M4 button-cut barrels. The titanium barrel nut with specialized coating manages heat faster than steel alternatives. These are the improvements that earned the Mk1 USSOCOM's Combat Assault Rifle contract over competing M4-pattern platforms.
