Anarchy Outdoors Dragonscale Bolt Knob 1.9 in Length Flat Dark Earth. As sleek and menacing as its namesake these replacement bolt knobs are ready to rock with any 5/16x24 threaded bolt. Specifications for Anarchy Outdoors Dragonscale Bolt Knobs: Manufacturer: Anarchy Outdoors Condition: New Threads per Inch: 5/16x24 Length: 1.5 in Features of Anarchy Outdoors Dragonscale Bolt Knobs Highest quality; Lightweight & Durable; 1.50'' Short Length; 1.90'' Long Length All of the standard thread knobs will fit on the Christensen Arms Standard Rifles Package Contents: Anarchy Outdoors Dragonscale Bolt Knobs Anarchy Outdoors 791617485822: Dragonscale Bolt Knob 1.9 in Length Flat Dark Earth