Grid Defense 9" Octagon M-Lok Rail

• Finished in Blue Titanium Cerakote
• 6000 Series Aluminum Octagon Extrusion
• MIL-STD 1913 Picatinny Rail
• M-Lok Slots on Four Sides
• QD Mounts on Each Side
• Clamp on System for Easy Assembly 
• Barrel Nut and Mounting Screws Inlcuded
• Made in the USA
• Inner Diameter 1.365"
• Weight: 10.5oz

You will need a 30mm wrench to tighten the barrel nut down (35-55lbs of torque) and a T25 star bit for the mounting screws (50 inch pounds).