Anti-Aircraft Site Sampi is an FND flak post in El Este. It covers La Joya Port, so clear it before you bring a plane or helicopter near the docks. Destroying it also gets you Depleted Uranium.
The site is built around a large framed anti-aircraft gun, a scaled-up version of a twin-barrel ZU-23 cannon, with two shoulder-fired missile launchers mounted beside it. FND soldiers guard the position, and the Depleted Uranium is kept somewhere on site for you to grab. It covers La Joya Port, so clear it before you bring a plane or helicopter near the docks.
Do not fly in. The site warns you over the radio, then opens fire, so arrive by road, boat or on foot. Scout from higher ground first and tag the guards with your phone. Like other FND positions, watch for alarms and cameras and shoot them before you go loud. When you reach the gun, one rocket or a Supremo blast is normally enough, or toss two or three grenades onto it.
You get the Depleted Uranium stored at the site, which is the main way to fund Supremos and Resolver weapons outside the Du or Die story mission. The airspace over this part of El Este also opens up, so you can fly here and use Air Drop.
After the story, Insurgencies let the FND Remnants retake anti-aircraft sites. You can destroy this one again when that happens, but you can never hand it back to the FND yourself.
Anti-Aircraft Site Chi
Anti-Aircraft Site Chi is an FND flak post in El Este. Wreck the gun to fly safely over this part of El Este and pick up the Depleted Uranium stored at the site.
Anti-Aircraft Site Lambda
Anti-Aircraft Site Lambda is an FND flak post in Sierra Perdida, El Este. It is out on the Lágrimas Islands, so plan a boat trip rather than a flight to reach it. Destroying it also gets you Depleted Uranium.
Anti-Aircraft Site Psi
Anti-Aircraft Site Psi is an FND flak post in Sierra Perdida, El Este. It protects Fort Fontana, so knocking it out first makes any air approach on the fort far safer. Destroying it also gets you Depleted Uranium.
Anti-Aircraft Site Rho
Anti-Aircraft Site Rho is an FND flak post in El Este. Its range reaches over the town of Concepción, so you cannot Air Drop into that town until it falls. Destroying it also gets you Depleted Uranium.