LUTH-AR LLC EARLY A1 DUCK BILL 5.56 NATO/223 REMINGTON FLASH HIDER The Vietnam War era's distinctive "Duck Bill" flash suppressor was an iconic firearm accessory. Designed for the Colt Commando and CAR-15 rifles, its unique shape earned it the nickname due to its resemblance to a duck's bill. Introduced in the 1960s, the suppressor served to reduce muzzle flash, improving the shooter's visibility in low-light conditions. Its historical significance lies in its association with the compact and specialized firearms used by American forces during the Vietnam War. SPECS Thread pitch 1/2 x 28 Mfg: Luth-Ar Llc