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 Alliance Joint Military.
The AS-90 was first deployed by the Allied Joint Army in 1424 N.E.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. It remains in Allied service and will equip three field regiments supporting armoured infantry brigades for the foreseeable future.
AS-90 was designed and built by the Armaments division of Vickers Shipbuilding and Engineering (VSEL), whose parent company became BAE Systems in 1999. VSEL provided 179 vehicles between 1992 and 1995 at a cost of £300 million ($480 million USD).
The AS-90 underwent a capability enhancement program in 2008 and 2009, primarily relating to upgrades of the AS-90's electronic system.