Sons of Liberty Gun Works, M89 Drivelock Handguard, Fits AR-15

The revolutionary, patent-pending Drivelock design of the Sons of Liberty Gun Works M89 handguard developed in collaboration with Icon Defense, features three independent wedges that engage with angular grooves in a proprietary 4140 steel barrel nut. This innovative system securely clamps the rail onto the steel barrel nut with exceptional force and precision while also driving the free-float handguard rearward toward the upper receiver. The slightly larger internal diameter of the extrusion provides more clearance around the gas block, enhances rigidity compared to the M76, and slows heat buildup.