Sons of Liberty Gun Works M4-L89 5.56mm 14.5" Bbl Mid Gas L89 Rail P&W Plan B FH Anodized BLK M4-L89 Complete Rifle M4-L89-556-145-PB-RIFLE-A-BLK

The Sons of Liberty Gun Works M4-L89 is a professional-grade rifle specifically configured for users of the Rearden / Q Plan B mounting ecosystem. By pinning and welding the Plan B flash hider to the 14.5-inch combat-grade barrel, SOLGW achieves a legal 16-inch overall barrel length, offering a compact, non-NFA solution that is suppressor-ready out of the box. This model features the premium L89 Drivelock handguard, which provides industry-leading rigidity for laser and optic retention. Like all top-tier SOLGW builds, it utilizes a mid-length gas system and the A5 Buffer System to ensure a smooth, reliable cycling window across a wide variety of duty ammunition and suppressor configurations.