Fortis Manufacturing Billet Dust Cover Features The Fortis Manufacturing Billet Dust Cover is machined from a solid piece of aircraft grade 6061-T6 aluminum a construction approach that delivers meaningfully greater durability and reliability compared to polymer versions found on many AR-15 builds. Because it is cut from billet rather than molded the cover holds tighter tolerances and resists the cracking or warping that can affect polymer parts over time. A Type III hardcoat anodize finish in gray adds a layer of wear and corrosion resistance on top of the aluminum s inherent strength. This combination makes the Fortis cover well suited to rifles that see heavy use at the range or in training environments. Designed to fit mil-spec AR-15 uppers on .223 and 5.56 compatible builds the cover installs as a straightforward upgrade over the factory ejection port dust cover with no special tools required beyond what a standard dust cover swap needs. It ships complete with its own spring and C-clip so the installation is a simple like-for-like replacement rather than requiring additional hardware to be sourced separately. At just 3.13 inches long 0.885 inches wide and 0.4 oz the cover adds negligible weight to the rifle while upgrading its durability. The Fortis Manufacturing Billet Dust Cover is available for sale at GrabAGun for AR-15 builders who want a stronger American-made alternative to a stock polymer cover. Fortis Manufacturing Billet Dust Cover Specifications Manufacturer: Fortis Manufacturing Model: Billet Dust Cover Type: Dust Cover Compatible Hosts: AR-15 Mil-Spec Uppers Material: Aircraft Grade 6061-T6 Aluminum Finish: Type III Hardcoat Anodized Color: Gray Length: 3.13 Width: 0.885 Weight: 0.4 oz Available At: GrabAGun