The Swingfire is a British tank destroyer. It was introduced in Update 1.63 "Desert Hunters".

The Swingfire is the first dedicated ATGM of the British nation tree. It doesn't have any cannons, just a light machine gun. Instead, it has two ATGM launchers that are reloaded separately and fire upwards with missiles that are guided by mouse. Missiles are slow and relatively easy to control, as long as they are visible by the ATGM camera. You can only directly control the missile last fired.

The main point is the player can fire while being completely concealed and fire on people that try to hide from the Swingfire, whether they are hiding behind rocks (vertically) or houses (horizontally). You just need to "swing" the missile into their cover, which surprises people who expect long-range ATGM sniping from 2 km range like other ATGMs. But another side of that is, it's very easy to see the missiles coming and hide from them, making it twice as hard to hit enemies unless the player can judge the distance well and drop missiles right on them.

Because of that, the main purpose of the Swingfire is either control of hills, castles, streets and so on to block enemy offensive pushes or assist in team assaults by hiding behind teammates, walls or rocks and blasting enemies out of cover.