DAO-12

The Armsel Striker, or DAO-12, is a South African revolver-like shotgun designed by Hilton Walker of the Sentinel Arms Company, originally stationed in Rhodesia (now Zimbabwe). With the original design having flaws, Walker redesigned the weapon in the 1980s, resulting in the Protecta model that has found its way around the world today. This weapon has earned itself the nickname of "Street Sweeper" for it's large shell capacity and high effective fire rate.

Battlefield 2
In Battlefield 2, the DAO-12 is the Tier One unlock for the Anti-Tank Kit. Unlike most unlocks, it is a completely different type of weapon from the defaults; the DAO-12 is a Semi-Automatic, 12 gauge shotgun whereas the Anti-Tank soldier would normally get a Sub-Machine Gun such as the MP5 or PP-19. This means that it is more powerful than the default weapon, but it has a significantly shorter effective range.

Battlefield 3
The DAO-12 is a weapon in the game Battlefield 3, and is unlocked early in the Battlefield 3 Limited Edition: Physical Warfare Pack.

Singleplayer
The DAO-12 can be found in the mission Kaffarov.

Multiplayer
The DAO-12 is compatible with flechette ammunition, frag ammunition, and regular shotgun shells with a capacity of 8-rounds (12 with the AMMO specialization). Like the 870 MCS it's long reload time is offset by the ability to fire while reloading. The Battlefield 3 DAO-12 has the stock extended as opposed to its Battlefield 2 counterpart which has the stock folded up and over the magazine well and barrel. For those who didn't pre-order the limited edition (Physical Warfare Pack), the DAO-12 will be available for unlock at level 38.

Trivia

 * The DAO-12 is referred to as "CHSHT_Protecta" in the game files.