Faxon Firearms' Enhanced Stripped Upper Receiver is a stripped upper-receiver component intended for compatible AR-15-style platforms. Because it is supplied in stripped form, additional components such as the forward assist and ejection-port cover may need to be installed separately, depending on the configuration. Faxon states that its AR-15 upper receivers follow applicable Mil-Spec tolerances for component compatibility. | Faxon Firearms Enhanced Stripped Upper Receiver