13.7″ Sons of Liberty Gun Works M4-89 5.56 Upper

13.7″ Sons of Liberty Gun Works M4-89 5.56 Upper

• .223/5.56
• 13.7″ Combat Barrel
• 13″ M89 MLOK Rail
• Pin/Weld NOX Muzzle Device
• Does not include BCG/CH

All SOLGW products ship for free and come with a lifetime, unconditional warranty.