Posted 18 Nov 2019 I have two AAC 51T flash hider mounts for sale. $75 shipped each. Advanced Armament Co (AAC) Blackout Flash Hider 51-Tooth Ratchet Suppressor Mount 5.56mm AR-15 1/2"-28 Thread Steel Matte. Each have been shot only one or two times. Louisville, Kentucky, United States Share this post Link to post Share on other sites