A new X-plane is expected to fly at the end of year. The XRQ-73 Shepard is a flying win UAV of a relatively small size at around 1,250 lbs. The aircraft is manufactured by Northrop Grumman and is designed to test "hybrid electric architecture" which came from an earlier project called, "Great Horned Owl (GHO)"
Somewhat tying into talks about missile test, a representative from XBow recently gave some statements on their expanding involvement in the solid rocket motor production supply chain for the DoD.
The full twitter thread has the representative mentioning that they are involved in, "SM-6 Mk72 and Mk104 motor developments" along with, "pursuing everything from small tactical motors to motors well above 34 inch diameter."