Gemtech ETM 3-Port Muzzle Brake 5.56mm (.223) 1/2X28 (.223) is the configuration on this listing. The listed caliber is 5.56mm (.223). The listed thread is 1/2X28 (.223). Additional information repeats only the stored manufacturer, model, and the fields that came with this row. If a measurement is not in that list and is not in the name, this page does not supply it. Nothing here states an overall length, a weight, or a sound rating.

When two Gemtech listings look alike, compare caliber, finish, color, and model name only where those fields are filled in. This page is Gemtech ETM 3-Port Muzzle Brake.