Sig Sauer SRD-556-MB -1/2×28 Tan is the configuration on this listing. No separate caliber is printed on this listing, so this description does not invent one. The listed thread is 1/2×28. The listed color is Tan. 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 Sig Sauer listings look alike, compare caliber, finish, color, and model name only where those fields are filled in. This page is SIG SRD-556-MB -1/2×28.