It has a bit of an expensive cost of 10,000 in Zombie Assault 2/Insane Asylum, however it is known for killing Zombies effectively and also has a high clip of 1,000 rounds, and also is fully automatic.
It also appears in Zombie Assault 3, costing the same but has an extremely low clip of 250 and is semi-automatic. It can be acquired from Power-up crates as well.
The ADWS is also an upgrade for the Vickers turret from SAS: Zombie Assault Tower Defense.
In Zombie Assault 2 and Insane Asylum, the ADWS can be reloaded by standing over it and pressing 'F'. In Zombie Assault 3, the weapon is virtually useless after it runs out of rounds. In Zombie Assault Tower Defense, the ADWS, as with all 'towers' in the game, has unlimited ammo.