Primary Weapons Systems FSC556 MOD 2 FSC Series Flash Suppressing Compensator Muzzle Device .223 Black 1/2x28 threads. Primary Weapons Systems machined these Flash Hiders from 4140 steel that's FNC LIFE HD treated to create the toughest and most corrosion-resistant part possible. The Primary Weapons Systems FSC Flash Suppressing PWS Compensator will greatly improve your accuracy by reducing recoil. These compensators also divert the flash keeping it out of your line of sight with or without optics. Equip the Primary Weapons Systems FSC Rifle Compensator to enhance your precision and keep your vision clear while taking down targets. Specifications for Primary Weapons Systems MOD 2 FSC Series Flash Suppressing Compensator: Product Color: Black Features of Primary Weapons Systems MOD 2 FSC Series Flash Suppressing Compensator: Material: 4140 Steel FNC LIFE HD treated Recoil reduction Flash suppression Package Contents: Primary Weapons Systems MOD 2 FSC Series Flash Suppressing Compensator FSC556 Flash Suppressing Compensator 1/2x28 threads .223