Delta V Xenos Muzzle Brake 5.56x45mm NATO/.223 Remington/6mm Creedmoor 1/2x28 Raw Bronze. 223 and 6mm cartridges - 28 thread two-port 5.56/.223/6mm. The Xenos has an overall diameter of 0.749 allowing users to remove their gas block without uninstalling the brake. The Xenos is first turned threaded and drilled on a lathe. It is then moved to the CNC mills where the ports are machined in place and inspected to a print to ensure concentricity and thread fitment. The left-hand threaded locking nut is integrated and allows the user to quickly and accurately time the brake to their host platform. Each Xenos is precision Machined heat treated 17-4 stainless steel. Specifications for Delta V Xenos Muzzle Brake: Manufacturer: Delta V Color: Bronze Caliber: 5.56x45mm NATO 6mm Creedmoor .223 Remington Finish: Raw Fabric/Material: 17-4 Stainless Steel Threads per Inch: 1/2x28 Gun Make: Universal Gun Model: Universal Inner Diameter: 6 mm Outer Diameter: 0.749 in Length: 2 3/8 in Weight: 1 oz Package Contents: Delta V Xenos Muzzle Brake What firearm models does the manufacturer say Delta V Xenos Muzzle Brake is compatible with? The manufacturer suggests that Delta V Xenos Muzzle Brake is compatible with UniversalDelta V XB-001-A: Xenos Muzzle Brake 5.56x45mm NATO/.223 Remington/6mm Creedmoor 1/2x28 Raw Bronze