The AS-90 (Artillery System for the 1990s; known officially as Gun Equipment 155 mm L131) is a lightly armoured self-propelled artillery piece used by the British Army.The AS-90 was first deployed by the British Army in 1993. 179 AS-90s were acquired to re-equip six of the eight self-propelled field artillery regiments (each 24 guns) in the 1 (BR) Corps, replacing the 105 mm FV433 Abbot SPG and older M109 155 mm Self Propelled Gun.