Quad rail from "safe queen" Noveske Recon. Comes with Gas Block and Tube, (2) Flash Hiders( 1 from same Noveske, 1 from POF)-both 556. Quad is in great shape, no visible marks or damage but it is used. $325. No price gouging here, a new one is $350 plus from Noveske direct. Thanks for looking. Trade for 9mm or .45acp ammo.