The AS90 is a 155mm self-propelled gun that equips three field regiments of the Royal Horse Artillery and Royal Artillery.
The AS90 is fitted with a 155mm, 39-calibre gun barrel. In trials, two AS90 guns were able to deliver a total payload of 261kg on to a single target in less than ten seconds.
An automated loading system enables the gun to fire with a burst rate of three rounds in fewer than ten seconds, an intense rate of six rounds a minute for three minutes and a sustained rate of two rounds a minute.
The gun is equipped with a recoil and hydrogas suspension system, which allows the turret to traverse and fire through a full 360°.