Lumley Arms Round Carbon Fibre Tactical Bolt Knob

• Genuine 3K carbon fiber, 1″ round ball
• 6061-T6 threaded insert epoxied-in during manufacture
• 5/16″ x 24 TPI (UNF / fine thread) to accept most bolt handles
• Threaded section 0.55″ deep.
• Weighs less than half an ounce (13 grams)!