Heavy Weapons Factory Heavy Weapons Factories were construction facilities used to build siege weapons for various factions . throughout galactic history . They were produced by droid or organic workers such as Glurrg s or Wookiees at a cost of 210 units of carbon and 25 units of ore . These buildings would typically produce units such as pummels , anti - air units , and artillery pieces . The units were also upgraded at Heavy Weapons Factories . The Gungans , Royal Naboo Security Forces , Trade Federation , Galactic Republic , Confederacy of Independent Systems , Galactic Empire , and the Rebel Alliance all used their own version of these factories . Known Heavy Weapons Factory types . Galactic Empire . The Galactic Empire ' s heavy weapons factories were composed of two buildings connected via a bridge . The larger building on the right side was trapezoidial and contained a deck that was either an observation deck or a place where parts were placed . It also contained a tower . The left building , the shorter of the two , contained a small stack . Between the two buildings on the ground was the construction area , where a levitating crane - like droid would utilize its arms to construct various weapons . There was also a globular device nearby . Similar to all Imperial - owned buildings , they were primarily gray with blue linings . Such facilities were where the Empire ' s Mobile Artillery , Heavy Artillery Platforms , All Terrain Anti Aircraft , Heavy All Terrain Anti Aircraft , Energy Pummels , and Heavy Energy Pummels were developed . Gungan . The Gungan weapons factories were primarily biomechanical in nature , similar to other Gungan - owned buildings . To the right of the building was a large pit , and the building itself was a large sea mesa . A prong also jutted out over the pit . A lesser pit was also nearby in front of the building . The building at its early stages of construction had a starfish on it , and also started developing undersea chimmneys during the second stages of construction . Such facilities were where Gungan energy catapults , Gungan Heavy Energy Catapults , Raapturs , Large Raapturs , Cerrabores , and Large Cerrabores were maintained and breeded . Rebel Alliance . The heavy weapons factories utilized by the Alliance to Restore the Republic were large buildings that were composed of a garage and a small storage space . The building had a satellite array for communications . The storage space stored various necessary parts . The garage contained a mechanical arm used to assemble the various siege weapons . Such facilities were where the Rebel Alliance ' s Artillery , Heavy Artillery , Proton Torpedo Launchers , Heavy Torpedo Launchers , Energy Pummels , and Heavy Energy Pummels were developed . Royal Naboo Security Forces . Due to the fact that Naboo was considered peaceful and thus lacked a large - scale military , the Royal Naboo Security Forces ' heavy weapons factories were rarely seen outside of Theed . However , a number of such facilities were ordered and developed across Naboo during the Invasion of Naboo . The facilities themselves was constructed from materials gathered by Royal Naboo PKN - 49 worker droids at a cost of 210 units of carbon and 25 units of ore . Royal pummels , artillery carts , and anti - air hovercraft and their heavier variants were designed , built , and housed here . The architecture was general Naboo - style architecture , and was composed of at least one smokestack as well as two buildings covered in wall ivy connected by a pathway above , and featuring a maintenance pit with a crane . Trade Federation . The Trade Federation utilized a brown building with a garage to maintain their various heavy weapons systems . The building also featured two smokestacks and an observation balcony . Wookiee . The Wookiees ' heavy weapons factories were composed , at least initially , of two buildings connected by an adjoining walkway , and had a pit for maintaining their various heavy weapons . Galactic Republic . The Grand Army of the Republic during the Clone Wars , or at least during the Hunt for the Decimator battleground , were ordered across the galaxy . The buildings had two garages and a maintenance pit , with one being on the second story of one building that was adjoining another building via a walkway . Confederacy of Independent Systems . The Confederacy of Independent Systems during the Clone Wars , or at least during the Hunt for the Decimator battleground , were ordered across the galaxy . Like other CIS - owned buildings , they were derived primarily from Geonosian architecture , and featured a massive pit with a spire emerging from the middle containing a cavern up top , and possessed purple patterns . Behind the scenes . Heavy Weapons Factories appear in the 2001 video game " " and its 2002 .