Aunty Jack 4 Way RPD
From threeA Wiki
The Aunty Jack 4 Way RPD, previously called "P.O.R.N.S.T.A.R RPG," is an extremely large, four-barreled rocket propelled grenade launcher in the WWR Universe that is wielded by the Heavy Bramble Mk 3. These brambles were refitted with larger arms and a larger engine to support the weapon as well as a new head for a better targeting system.
It is not known what "RPD" specifically stands for.