In the early 2000s, the U.S. Navy tested DRS Technologies' Sentry and Sentry HP for the Multi-Role Endurance (MRE) unmanned air vehicle (UAV) program.  

In 2003-2004, Naval Surface Warfare Center Panama City sponsored testing under the name of the STORK project where a Sentry successfully deployed an unmanned ground vehicle via parachute.

DAM NECK, Va. (June 5, 2007) - Secretary of the Navy (SECNAV) The Honorable Dr. Donald C. Winter (white shirt on the right) receives a brief on the “Sentry HP” Unmanned Aerial Vehicle (UAV) while touring Naval Special Warfare Development Group. U.S. Navy photo by Chief Mass Communication Specialist Shawn P. Eklund