PRODUCTS › 556 3 Prong Flash Hider Image 1 of 3 Image 2 of 3 Image 3 of 3 556 3 Prong Flash Hider $0.00 Made from 17-4 precipitation hardened stainless steel. Thread: M14x1 LH 1/2 - 28 Add To Cart Added! Made from 17-4 precipitation hardened stainless steel.