As the final piece to any puzzle, your build is not complete until it has a proper muzzle device affixed to it. We have made sure to procure the finest of options for your Rosco builds. From Mil-Spec A2 flash hiders, to performance enhancing compensators, all the way to devices that will help you reach 16" OAL. We've sourced and stocked them here for you to find in this perfect one-stop shop. Caliber Available in either 5.56X45MM or .30 Cal Material Stainless Steel Finish Melonited Thread Pitch 1/2X28 TPI (5.56), or 5/8X24 TPI (.30 Cal)