Fortis Manufacturing Billet Dust Cover Carbon Fiber Red Red. This ensures overall durability and reliability vs other polymer versions. Easy to install and upgrade yexisting ejection port dust cover on y.223/556 compatible builds. Will fit into mil-spec AR15 uppers and will quickly upgrade the form and function of yAR15. Specifications for Fortis Manufacturing Billet Dust Cover: Manufacturer: Fortis Manufacturing Finish: Type III Hardcoat Anodized Gun Model: AR-15 Fabric/Material: Aircraft Grade 6061-T6 Aluminum/Carbon Fiber Condition: New Package Contents: Fortis Manufacturing Billet Dust Cover Ejection Port Dust Cover Spring Ejection Port Dust Cover C-Clip What firearm models does the manufacturer say Fortis Manufacturing Billet Dust Cover is compatible with? The manufacturer says that Fortis Manufacturing Billet Dust Cover is compatible with AR-15Fortis Manufacturing DC-CF-RED: Billet Dust Cover Carbon Fiber Red Red