The Yankee Hill Machine sRx Quick Detach Muzzle Brake Short features a durable black phosphate steel construction with 5/8"-32 TPI threading for reliable performance and corrosion resistance.YHM sRx Q.D. Muzzle Brake Short (Model 4445-MB-32)5/8"-32 TPI thread pattern for secure attachmentBlack phosphate finish on steel constructionQuick Detach design compatible with sRx adaptersCompact short profile for reduced overall lengthDesigned for use with Yankee Hill Machine sRx suppressor systems this muzzle brake provides effective recoil reduction while maintaining the ability to quickly attach compatible suppressors when needed.