This Yankee Hill Machine Phantom QD flash hider is used for YHM Sound Suppressors. It retains the excellent flash hiding capabilities of the original Phantom. The Carbon Scrapers (Teeth) remove or scrape carbon from the internal support system of your can. The Dual Support System supports and aligns the suppressor to your bore. The Dust Enclosure hides and protects all internal moving parts within the the quick disconnect system. Features5 Port Design decreases visible flashExternal Locking Mechanism keeps heat away from the spring mechanismHigh-Temperature Spring holds up better over a longer service life