Liberty Precision Machine Eclipse Flash Hider Features The Liberty Precision Machine Eclipse flash hider is built with a 3.05 inch total length that brings a 13.7 inch barrel up to the legally required 16.1 inch overall rifle barrel length. Its .30 caliber bore and 1/2x28 thread pitch make it a direct fit for common pin and weld configurations on .30 caliber rifles. All critical alignment features are machined in a single setup ensuring the bore and threads stay perfectly concentric for reliable function and consistent accuracy. A 13/16 inch rear hex simplifies installation and removal during gunsmithing work. Machined from 17-4 PH stainless steel and heat treated to H900 condition the Eclipse is built to serve as a sacrificial blast baffle while still providing substantial flash reduction over an OEM muzzle device. Its square shoulder and 360 degree port orientation eliminate the need for shims during installation simplifying the pin and weld process for gunsmiths. The Eclipse is also compatible with common .900 inch by 24 silencer mounts including the Q Plan-B and Rearden Manufacturing Atlas giving shooters a path to suppressor use. Finished in black nitride and weighing just 3.5 ounces this flash hider is a durable purpose-built solution for pin and weld barrel length compliance. Liberty Precision Machine Eclipse Flash Hider Specifications Manufacturer: Liberty Precision Machine Model: Eclipse Flash Hider Caliber: .30 Caliber Color: Black Material: 17-4 PH Stainless Steel Finish: Nitride Length: 3.05 Thread Pattern: 1/2x28 Weight: 3.5 oz Available At: GrabAGun