Yankee Hill Machine Company Dust Cover Assembly Features The Yankee Hill Machine Company Dust Cover Assembly is built from steel giving it the strength to stand up to repeated opening and closing cycles as the bolt carrier group cycles in and out of battery. The cover is caliber marked 7.62x39mm which helps builders and owners keep their rifle correctly labeled for the chambering it is actually built around. Keeping the ejection port covered when the rifle is not in use helps keep dirt moisture and debris out of the action. This small detail matters for reliability especially on a rifle that may see field use or long-term storage. The assembly ships complete with the rod retaining clip and spring required for installation so there is no need to source additional small parts separately. This makes it a straightforward swap for anyone replacing a damaged or missing dust cover on their AR-15 pattern rifle. Because it is sold as a complete assembly rather than a bare cover installation is simplified for builders assembling an upper from individual components. The Yankee Hill Machine Company Dust Cover Assembly is a practical affordable upgrade for any 7.62x39mm AR-15 build. Yankee Hill Machine Company Dust Cover Assembly Specifications Manufacturer: Yankee Hill Machine Company Model: Dust Cover Assembly Type: Dust Cover Material: Steel Caliber Marking: 7.62x39mm Compatible Hosts: AR-15 Included Components: Rod Retaining Clip Spring Available At: GrabAGun