According to some sources, the LIM-100 designation was not used to avoid confusion with target drone conversions of surplus F-100 fighters. Another version is that the Department of Defence Designation was allocated to but not used for the Sprint II, an uprated version of the Sprint anti-ballistic missile considered in 1972.
Historical Essay © Andreas Parsch
On 27 October 1972, the designations XLIM-99A and XLIM-100A were reserved by the U.S. Army for unidentified missiles. Unfortunately no further details are available, but the reservation was apparently not followed-up by a formal request for nomenclature allocation (see the LIM-99 page for a brief discussion about which missile projects might have had reserved the numbers 99-100).Specifications
The missile project, for which the LIM-100 designation was reserved, has not been identified so far.Main Sources
 Department of Defense Missile Nomenclature Records
AKA: LIM-100; Super Sabre.
Status: Cancelled 1975.