Made in the usa, the vostok is an ak style muzzle brake from ultradyne, provides exceptional performance in compact design.Gases are strategically diverted away and out of the shooters line of sight.It strongly reduces recoil and minimizes muzzle rise helping the shooter get back on target quicker to ensure a more accurate followup shots.Finish: Black NitrideModel: VostokMaterial: 416 Stainless SteelThread Pattern: 14x1 LH