Daniel Defense Flash Suppressor Assembly Muzzle Flash Reduction Device. Manufactured from aerospace 17-4 stainless steel Minimal chance of corrosion. Salt bath nitride finish keeps maintenance to a minimum.This is the standard length Daniel Defense Flash Suppressor with 1/2 x 28 TPI. Includes one crush washer. Thread: 1/2 x 28 TPI Length: Standard (1.875") Note: The Standard Length with 1/2 x 28 TPI is compatible with Advanced Armament Omni, Gemtech Halo, KAC NT-4 QDSS.