The D30 is an artillery piece. It is a Soviet-made 122mm howitzer developed in the 1960s by Artillery Plant No 9 in Sverdlovsk, created primarily for infantry indirect-fire support as well as anti-tank support.
The D30 is a stationary emplacement featured in Battlefield 2. It makes up one part of the Commander resources for the MEC and PLA on a number of maps, and stands opposite of the USMCLW155. The weapon, and its counterpart, both are destructible, but also possess one of the most powerful attacks in the game.