Already have a Keymo or Xeno adapter and want to make your own Pyro? This is the missing piece. The vented shroud combined with your adapter turns your existing Xeno or Keymo muzzle device into an extremely effective brake. Get all the benefits of a brake while keeping your flash hider installed. Dead Air Silencers Dead Air P-Series Pyro 2.0 .45 Caliber Shroud for P-Series Adapters, Boosters and Direct Thread DA466S