The C4-CZN ion field gun, which could be mounted on a tripod, was an ion cannon that was perfectly suited for giving ground troops the ability to fight against starships or armored vehicles.
In 1 BBY, during an assault on Level 88 of Nar Shaddaa by two Imperial Gamma-class assault shuttles, members of the Rebel SpecForce employed a C4-CZN to fend off the attackers.