Aero Precision AR15 Ejection Port Cover Kit Black. Includes: Ejection Port Cover Door Ejection Port Cover Rod with c-clip Ejection Port Cover Spring Specifications for Aero Precision AR15 Ejection Port Cover Kit: Manufacturer: Aero Precision Color: Black Gun Model: AR-15 Condition: New Country of Origin: USA Package Contents: Aero Precision AR15 Ejection Port Cover Kit What firearm models does the manufacturer say Aero Precision AR15 Ejection Port Cover Kit is compatible with? The manufacturer says that Aero Precision AR15 Ejection Port Cover Kit is compatible with AR-15Aero Precision APRH100002: AR15 Ejection Port Cover Kit Black