an Entity references as follows:
The Rose turret (sometimes known as the Rose-Rice turret) was a gun turret fit to the rear position of some British Avro Lancaster heavy bombers in 1944–45. It was armed with two American light-barrel Browning .50-calibre AN/M2 heavy machine guns — the standard American defensive weapon used in turreted and flexible mounts in the B-17 Flying Fortress and B-24 Liberator.