The West and East Wing date from the 1860s and are built from brick and stone.
They had a lines of gun positions, each designed to hold a heavy gun and a crew of up to 12 men.
The positions were protected by granite-fronted casemates and wrought-iron shields, and, with removable window screens, doubled as living accommodation for the crews.
Small magazines were positioned behind the lines of casemates.

The West Wing is approximately 215 metres (705 ft) long, and has 37 heavy gun positions and two main magazines, along with various auxiliary buildings, including canteens, stores and detention facilities.
It also has two of the castle's lighthouses, an 1865 tower, now disused, and an iron, gas-lit tower, still in use.
The garden is a recreation of the garden in the Second World War.
The late-19th century and early-20th guns at the castle were predominantly added to the West Wing, and it roof supports emplacements for 12- and 6-pounder (5.4 and 2.7 kg) quick-firing guns, a Bofors gun and associated directing positions.
A small theatrical theatre, built by gunners in the Second World War, survives in one of the gun positions, along with various wall paintings, possibly used in performances.

The East Wing is relatively unaltered since its construction.
It is approximately 150 metres (490 ft) long, with 24 heavy gun positions and two main magazines; on the roof is the original gun directing position and a Bofors gun position added during the Second World War.
It is reached through a gateway in the north-east bastion.
Just beyond the East Wing are three 6-pounder quick-firing gun emplacements from 1893, which were fed ammunition from the wing through a hole in the outer wall.
The West and East Wing date from the 1860s and are built from brick and stone. They had a lines of gun positions, each designed to hold a heavy gun and a crew of up to 12 men. The positions were protected by granite-fronted casemates and wrought-iron shields, and, with removable window screens, doubled as living accommodation for the crews. Small magazines were positioned behind the lines of casemates.
The West Wing is approximately 215 metres (705 ft) long, and has 37 heavy gun positions and two main magazines, along with various auxiliary buildings, including canteens, stores and detention facilities. It also has two of the castle's lighthouses, an 1865 tower, now disused, and an iron, gas-lit tower, still in use. The garden is a recreation of the garden in the Second World War. The late-19th century and early-20th guns at the castle were predominantly added to the West Wing, and it roof supports emplacements for 12- and 6-pounder (5.4 and 2.7 kg) quick-firing guns, a Bofors gun and associated directing positions. A small theatrical theatre, built by gunners in the Second World War, survives in one of the gun positions, along with various wall paintings, possibly used in performances.
The East Wing is relatively unaltered since its construction. It is approximately 150 metres (490 ft) long, with 24 heavy gun positions and two main magazines; on the roof is the original gun directing position and a Bofors gun position added during the Second World War. It is reached through a gateway in the north-east bastion. Just beyond the East Wing are three 6-pounder quick-firing gun emplacements from 1893, which were fed ammunition from the wing through a hole in the outer wall.
Hurst Castle