Shop › PHASE5 FATMAN HEX BRAKE 556 BLK PHASE5 FATMAN HEX BRAKE 556 BLK $120.00 Phase 5 Weapon Systems FATman Hex Brake, 1/2 x 28 RH, Parkerized Finish, 223 Rem/556NATO FATman-556 Quantity: Add To Cart Added! Phase 5 Weapon Systems FATman Hex Brake, 1/2 x 28 RH, Parkerized Finish, 223 Rem/556NATO FATman-556