The Challenger is essentially a modified Shir 2, which was built for Iran.
It is fitted with Chobham laminated armor, a 1200 hp diesel engine, automatic transmission, and improved fire control system (IFCS).
The Challenger's layout is similar to that of the Chieftain.
The driver's compartment is at the front, the turret and fighting compartment in the center, and the engine and transmission at the rear.
The driver has a single-piece hatch cover that lifts and swings forward horizontally for driving with his head out.
He can also exit through the fighting compartment.
Behind the driver's hatch is one wide-angle periscope.
The commander sits on the right of the turret, behind and above the gunner.
The loader is to the left.
The commander's cupola either has a day sight or an image intensification swap sight.
The cupola has nine periscopes for all-around viewing.
A Thermal Imaging Surveillance and Gun Sighting Sight (also TOGS, for Thermal Observation and Gunnery Sight) is located in an armored box on the right of the turret, and can separately serve the commander and gunner.
The loader has a periscope swivel-mounted on the roof forward of a two-piece hatch that opens front and rear.
No longer in service with the British Army. Currently in service with Jordan.
Recognition features:
- Supported full track; drive sprocket in rear.
- Six aluminum road wheels (space between third and fourth road wheels); four return rollers.
- Side skirts angled sharply at rear, partially exposing sixth road wheel.
- Skirt covers upper track similar to Chieftain.
- Square/angled, box shaped hull.
- Hull armor is streamlined with flat surfaces.
- Upper and lower glacis form a straight edge.
- Driver compartment recessed into the center of the upper glacis.
- Large angular, faceted turret with sloped front, flat on top.
- Center-mounted turret and fighting compartment.
- Five smoke dischargers on each side of the front of the turret.
- Small bustle racks located at each rear turret corner.
- NBC environmental control system mounted at the turret rear.
- No gun mantle.
- Long 120mm main gun with thermal jacket and muzzle reference system (MRS) collimator.
- Bore evacuator located 1/3 back from the muzzle.
- Gunner primary sight recessed into the right front turret roof.
- One 7.62mm machine gun mounted coaxially.
- One 7.62-mm machine gun mounted on commander's cupola.