Sons of Liberty Gun Works M4-L89 5.56mm 14.5" Bbl Mid Gas L89 Rail P&W ASRFH Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4L89-556-145-ASR

The Sons of Liberty Gun Works M4-L89 is an upper receiver group. It features a 14.5-inch barrel with a pinned and welded flash hider to meet standard length requirements. The assembly includes an L89 rail system designed for stability and a mid-length gas system. This configuration is intended for use as a component in a complete rifle assembly and is optimized for durability and the attachment of various accessories via the integrated rail system.