Presma AR-15 Ejection Port Dust Cover Assembly Black. When you pull the trigger on these Presma AR-15 Ejection Port Dust Covers you get the rod spring and e clip needed to ensure a proper and secure fit to your weapon. The anodized black finish on the Presma AR-15 Dust Cover adds a subtle touch of class to your gun's aesthetic. Keep your weapon clean and properly maintained with the Presma AR-15 Upper Receiver Dust Cover. Specifications for Presma AR-15 Ejection Port Dust Cover: Manufacturer: Presma Color: Black Finish: Anodized Gun Model: AR-15 Condition: New Package Contents: Presma AR-15 Ejection Port Dust Cover Rod Spring (2) E clips What firearm models does the manufacturer say Presma AR-15 Ejection Port Dust Cover is compatible with? The manufacturer suggests that Presma AR-15 Ejection Port Dust Cover is compatible with AR-15Presma ARDC01: AR-15 Ejection Port Dust Cover Assembly Black