Rapier (missile)
It soon became noticed that a version of Rapier that could be moved around was needed.  BAC decided to change Rapier to fit onto  the M548, a version of the M113 armored personnel carrier. In 1974, this weapon was developed as "Tracked Rapier". The vehicles were bought by the British Army.  The first Tracked Rapiers were used with 11 (Sphinx) Air Defence Battery, of 22 Air Defence Regiment, Royal Artillery in 1982-83.