The KE-15 Forged flat top upper receiver is precision machined from hi grade 7075 forgings to MilSpec standards, made to fit all M16/M4 rifles and carbines. Features USGI type T marked top, making it easy to remount any of your tactical accessories. Is milspec hard anodized and is ready to be assembled with your choice of components. Add Cerakote upgrade or completion kit to include forward assist and steel ejection port cover.