Sons of Liberty Gun Works M4-L89 .300 BLK 8.5" Bbl L89 Rail A2 Flash Hider Anodized Black M4-L89 Complete SBR (NFA) M4-L89-300-85-SBR-A-BLK

The Sons of Liberty Gun Works M4-L89 is a specialized, short-barreled rifle optimized for the .300 Blackout cartridge. With its 8.5-inch barrel, this NFA-regulated firearm is engineered to deliver maximum ballistic efficiency for both subsonic and supersonic loads in a highly compact package. It features the signature L89 Drivelock handguard, providing the extreme rigidity required for maintaining zero with rail-mounted lasers—a critical feature for a platform often used in low-light or suppressed operations. Built with the A5 Buffer System and a Liberty Fighting Trigger, this SBR is designed to provide the same duty-grade reliability and smooth cycling as SOLGW’s full-sized M4 rifles, but in a size optimized for close-quarters work and suppressed use. Sons of Liberty Gun Works M4-L89 .300 BLK 8.5" Bbl L89 Rail A2 Flash Hider Anodized Black M4-L89 Complete SBR (NFA) M4-L89-300-85-SBR-A-BLK