Sons of Liberty Gun Works M89 Drive Lock Rails - 13.75 Inch

The revolutionary, patent-pending Drivelock design, uses three independent wedges that interface with the angular grooves in our proprietary barrel nut. This system clamps the rail onto the steel barrel nut with extreme force and precision, while also driving the handguard rearward towards the upper receiver. The slightly larger ID of that extrusion gives us more real estate around the gas block, even more rigidity than the M76, and takes longer to heat.

Features: 

• Internal Diameter:  1.4"
• Length:  13.75" OAL
• Weight:  1lb 0.2oz w/ barrel nut and mounting hardware
• M-LOK slots at 45° positions
• Steel Barrel Nut
• Finish: Mil-Spec MIL-A-8625F, Type III, Class 2, Hard Anodized Coating, Non-Reflective, NiAc Seal (Anodized to match SOLGW receivers)
• T-Marks: Engraved T-Marks
• What’s included: 4140 Steel QD Socket, Rail, Barrel Nut, Lock-Up Components, and Instructions for Installation

The Sons Of Liberty Gun Works 13.75” M89 Handguard. This new model uses Sons Of Liberty Gun Works patent-pending Drivelock design. The handguard uses three independent wedges that interface with the angular grooves in their proprietary barrel nut. This system clamps the rail onto the steel barrel nut while also driving the handguard rearward towards the upper receiver. The slightly larger inside diameter of that extrusion gives more real estate around the gas block, even more rigidity than the M76 style handguard and takes longer to heat.