The Daniel Defense Superior Suppression Device is designed to offer muzzle flash signature reduction and reduced muzzle rise. Manufactured from aerospace 17-4 stainless steel and salt bath nitride finished, maintenance is kept to a minimum. The Daniel Defense Superior Suppression Device comes in standard length and 1/2 x 28 TPIThread: 1/2 x 28 TPILength: Standard (1.875")Made in the USA!