ℹ️ ➖➖➖ The MD Helicopters MD 500 series is an American family of light utility civilian and military helicopters. The MD 500 was developed from the Hughes 500, a civilian version of the US Army's OH-6A Cayuse/Loach. The 500 series design features shock-absorbing landing skid struts, a turboshaft engine mounted at a 45-degree angle toward the rear of the cabin pod, a fuel tank cell under the floor and the battery in the nose. The engine exhaust port is located at the end of the cabin pod underneath the tail boom. It has a short-diameter main rotor system and a short tail, giving it an agile control response and is less susceptible to weather-cocking.
📑 ➖➖➖ In 1985, North Korea managed to circumvent US export-control barriers by covertly purchasing 87 civilian-type Hughes MD 500s from a West German export firm, before the US government learned of the illegal action by North Korea and moved to stop further deliveries to the country. There are reports indicating that at least sixty of the helicopters delivered to North Korea were modified to serve as helicopter gunships. As South Korea produces the MD 500 domestically (under license) for use by its own armed forces, the modified helicopters operated by North Korea were deemed useful in conducting covert or deceptive operations against South Korea (such as incursions past the border).
The modified MD 500 helicopters were finally revealed by North Korea and seen by the US and European countries during North Korea's Victory Parade held on 27 July 2013 in Pyongyang, to commemorate the 60th anniversary of the end of the Korean War in 1953. Images and analyses done regarding North Korea's MD 500 helicopters show that they have been modified significantly to serve as light attack helicopters, such as modification work on the helicopters for them to be mounted with Soviet-designed AT-3 Sagger anti-tank wire-guided missiles.

▪️🛠 Manufacturer Hughes Helicopters
McDonnell Douglas Helicopter Systems
MD Helicopters
▪️✅ First flight 27 February 1963
▪️👤 Crew: 2
▪️👥 Capacity: 3 passengers
▪️📏 Length: 32 ft 7 in (9.93 m)
▪️↕️ Height: 8 ft 9 in (2.67 m)
▪️⬇️ Empty weight: 1,591 lb (722 kg)
▪️↗️ Max takeoff weight: 3,550 lb (1,610 kg)
▪️⚙️ Powerplant: 1 × Allison 250-C30 turboshaft engine, 650 shp (480 kW)
▪️↔️ Main rotor diameter: 27 ft 4 in (8.33 m)
Main rotor area: 587.5 sq ft (54.58 m2)
Blade section: - NACA 0012
▪️⏭ Maximum speed: 152 kn (175 mph, 282 km/h)
▪️⏩ Cruise speed: 135 kn (155 mph, 250 km/h)
▪️🛢 Range: 232 nmi (267 mi, 430 km)
▪️🔂 Service ceiling: 18,700 ft (5,700 m)
▪️⬆️ Rate of climb: 2,070 ft/min (10.5 m/s)

Ref: Wikipedia.