The Sons of Liberty Gun Works M4-76 is a semi-automatic AR-pattern rifle chambered in .223 Remington/5.56 NATO. It has a 13.7-inch barrel pinned to a 16-inch overall barrel length with a pinned muzzle device, giving it a standard-compliant configuration. The rifle holds 10+1 rounds and was developed in collaboration with Sage Dynamics. 
 

Key Specifications 

• Brand: Sons of Liberty Gun Works 
• Model: M4-76 
• Caliber: .223 Remington/5.56 NATO 
• Action: Semi Auto 
• Barrel Length: 13.7 inches (pinned to 16-inch OAL) 
   

Detailed Features 

• .223 Remington/5.56 NATO chambering in an AR-pattern platform 
• 13.7-inch barrel with pinned muzzle device to achieve 16-inch OAL 
• 10+1 round capacity 
• Sage Dynamics collaboration (LRF variant) 
• Semi-automatic AR configuration

Owners of the Sons of Liberty Gun Works M4-76 in the Sage Dynamics configuration often cite the tight tolerances and premium parts selection as the main reason for choosing it over comparable AR builds. The collaboration with Sage Dynamics gives the package a practical, use-oriented focus that resonates with owners who run their rifles hard.

The 13.7-inch pinned barrel configuration is a common topic. Owners appreciate the handling characteristics of the shorter gas system while keeping the build in a non-restricted configuration. The pinned muzzle device is viewed pragmatically, though a minority of owners would prefer a standard 16-inch barrel for more flexibility in muzzle devices.

Value discussions around SOLGW rifles are common. The M4-76 commands a premium over many AR options and owners who take issue with the price typically point to less expensive ARs that deliver comparable accuracy. Long-term owners counter that the fit and finish, along with parts quality, justify the cost over extended use.