An integrated assembly for a mineral extraction system includes an annular blow out preventer (BOP) portion that includes a BOP body coupled to a first portion of an one-piece body, where the annular BOP portion is configured to seal an outer drill string of the mineral extraction system, a diverter portion formed at least partially by a second portion of the one-piece body, where the diverter portion comprises one or more openings, and a rotating control unit (RCU) assembly portion comprising a third portion of the one-piece body coupled to a rotation enabled portion, where the RCU assembly portion is configured to divert drilling fluid through the one or more openings of the diverter portion.