This Yankee Hill Machine dust cover assembly is marked 7.62x39mm, so a 7.62x39 AR-15 upper is identified at a glance. It replaces the ejection port cover on an AR-15 upper receiver and keeps dirt out of the bolt carrier area when the rifle is closed. A simple way to label a dedicated 7.62x39 build or to swap out a worn or plain cover.
- Brand: Yankee Hill Machine (YHM)
- Type: Ejection port dust cover assembly
- Marking: 7.62x39mm
- Fits: AR-15 upper receivers
- Manufacturer part number: YHM-111-762
