Hibex was a 5.2 m long test vehicle used by the Army in a series of research experiments investigating high performance missile boosters. During mid-1960's experimental flights at White Sands, Hibex was fired successfully from underground cells and above-ground launch sites. The HIBEX program was part of the Advanced Research Projects Agency's Project Defender, a study of ballistic missile defense systems. HIBEX was designed for low level intercept of entry vehicles below 3 km altitude within 2 seconds of launch. Hibex' neutron-generating warhead would disable the fissile core of the incoming enemey re-entry vehicle. It would also kill all living things within a 5 km radius of detonation. This concept was further developed into the production Sprint missile for close-in anti-ballistic missile defense.

Manufacturer: Boeing. Launches: 10. Success Rate: 100.00%. First Launch Date: 1965-02-01. Last Launch Date: 1966-01-13. Launch data is: incomplete. Apogee: 20 km (12 mi). Liftoff Thrust: 0 N ( lbf). Total Mass: 6,000 kg (13,200 lb). Core Diameter: 1.22 m (4.00 ft). Total Length: 5.20 m (17.00 ft).