The Assault Shotgun, based on the Dao-12 Streetsweeper, is a shotgun featured in the downloadable episodic pack The Lost and Damned for Grand Theft Auto IV. It is a fully automatic shotgun that can easily pierce through enemies and destroy vehicles very quickly. It first appeared in the mission Heavy Toll when the player stop a convoy and steal a van full cocaine when it is escorted by Reginas. It can be purchased from Terry's gun van and will spawn at the players safehouses after 40 gang wars.
- The Assault Shotgun shown in-game looks like a DAO-12 Streetsweeper, however the DAO-12 is not fully automatic in real life. The Shotgun in-game acts more like an AA-12, a similar-looking shotgun that is fully automatic.
- Despite its many in-game names (such as Dao-12, Streetsweeper, Dao-12 Streetsweeper, Assault Shotgun, etc) its real name is the "Armsel Striker".
- If the player blind fires with Dao-12 he will be seen placing 12-gauges in the gun after every shot is fired, even if there are still shells to be fired.