Threaded for all 1/2"-28 threaded rifles and carbines. Reduces flash signature, has a diamond-shaped strike face. Length: 2.25", installs easily. Will not fit 6.8mm, 9mm, or 308. Made in the USA by Troy Industries. Prior to purchasing this item, customers are advised to verify that attaching this item to their firearm will not violate any applicable law in their location. This item is restricted in the following locations: California; Connecticut; Illinois, Washington, DC; New York; Washington State.