Noveske Dust Cover 6MM ARC Fits AR Rifles Black Ejection Port Cover Kit Includes Dust Cover Rod Spring and Clip. It features an engraving of "6MM ARC" on the out facing side. Includes port door rod spring and clip. Specifications for Noveske Dust Cover 6MM ARC Fits AR Rifles Black Ejection Port Cover Kit Includes Dust Cover Rod Spring and Clip: Manufacturer: Noveske Color: Black Finish: Black Gun Model: AR-15 Fabric/Material: Steel Handle Color: Black Features of Noveske Dust Cover 6MM ARC Fits AR Rifles Black Ejection Port Cover Kit Includes Dust Cover Rod Spring and Clip: Fits Standard Mil-spec upper receivers Package Contents: Noveske Dust Cover 6MM ARC Fits AR Rifles Black Ejection Port Cover Kit Includes Dust Cover Rod Spring and Clip What firearm models does the manufacturer say Noveske Dust Cover 6MM ARC Fits AR Rifles Black Ejection Port Cover Kit Includes Dust Cover Rod Spring and Clip is compatible with? The manufacturer says that Noveske Dust Cover 6MM ARC Fits AR Rifles Black Ejection Port Cover Kit Includes Dust Cover Rod Spring and Clip is compatible with AR-15