The Sons of Liberty Gun Works M4 is a semi-automatic AR-pattern pistol chambered in 5.56 NATO with an 11.5-inch barrel. It has an A2 configuration and a carbine-length gas system. This is an 11.5-inch pistol configuration; adding a stock would require additional federal paperwork. 
 

Key Specifications 

• Brand: Sons of Liberty Gun Works 
• Model: M4 
• Caliber: 5.56 NATO 
• Action: Semi Auto 
• Barrel Length: 11.5 in 
   

Detailed Features 

• 11.5-inch barrel in a pistol configuration 
• A2 configuration 
• Carbine-length gas system (CRGAS) 
• AR-pattern platform

SOLGW M4 owners point to consistent build quality as the primary reason to pay the premium over larger production brands. The 11.5-inch pistol configuration is compact, and the carbine gas system is a well-regarded setup at this barrel length. First impressions of fit and finish are consistently positive.

The A2 configuration draws some mixed opinions. Some owners appreciate the classic layout and swap the muzzle device immediately; others would prefer the rifle to ship with a more modern option. The pistol format itself divides buyers who prefer the pistol legal configuration versus those who go the registered SBR route.

Lead times and dealer availability are the most common complaints, not the product itself. At its price tier, the SOLGW M4 is not competing with budget ARs, and buyers who choose it based on brand reputation tend to be satisfied with the result.