Fortis Manufacturing Billet Dust Cover Features The Fortis Manufacturing Billet Dust Cover replaces the standard ejection port cover on mil-spec AR15 uppers with a solid piece of aircraft grade 6061-T6 aluminum. Where many factory and aftermarket dust covers rely on stamped or polymer construction this billet piece holds up to repeated cycling without cracking or wearing out. Its 3.13 inch length and 0.885 inch width are built to the mil-spec envelope so it drops into .223/5.56 compatible builds without modification. The result is a small component that quietly outperforms the parts it replaces. Finished with a Type III hardcoat anodize in Olive Drab Green the cover resists corrosion and wear while matching OD Green furniture and coatings elsewhere on the rifle. At a mere 0.4 oz it adds essentially no weight to the upper while delivering a noticeable upgrade in look and feel. Installation is straightforward making it an easy weekend project for any AR15 owner. Builders looking to finish out a custom upper with a cohesive color scheme will find this an easy worthwhile addition. Fortis Manufacturing Billet Dust Cover Specifications Manufacturer: Fortis Manufacturing Model: Billet Dust Cover Color: OD Green Material: Aircraft Grade 6061-T6 Aluminum Finish: Type III Hardcoat Anodize Compatible Hosts: AR-15 Weight: 0.4 oz Length: 3.13 Width: 0.885 Available At: GrabAGun