ال MiG-19 is the original Soviet aircraft, designed by Mikoyan-Gurevich and built in the USSR (with licence production also in Poland and Czechoslovakia). The Shenyang J-6 is China’s licensed copy of the MiG-19S, built by the Shenyang Aircraft Factory from the late 1950s; the version China exported was designated F-6. Mechanically the J-6/F-6 is very close to the Soviet MiG-19S — same twin-engine layout, same three-cannon armament — but China kept it in production for decades after Soviet lines had closed, refining and simplifying it and building far more than the USSR ever did. So when you read about a “MiG-19” in Pakistani, Vietnamese, Egyptian or Bangladeshi service, it is almost always really a Chinese-built J-6 or F-6. We use “MiG-19” for the Soviet aircraft and the family as a whole, and “J-6 / F-6” where the Chinese-built machine is specifically meant.

The MiG-19S was built around three 30 mm NR-30 cannon, a battery capable of destroying a bomber or fighter with a short burst. This ran against the trend of the late 1950s, when the United States and others increasingly believed guided missiles would make the gun obsolete — a belief that led to fighters such as early F-4 Phantoms carrying no internal cannon at all. Combat over Vietnam and the Middle East later showed that guns still mattered in a close turning fight, and the Chinese-built J-6 and F-6, with their three heavy cannon, were respected precisely because they could hit hard at short range. Exact effectiveness figures vary by account and should be read with caution, but the design philosophy — keep the guns — aged well.

In Soviet service the MiG-19 was a brief interlude between the subsonic MiG-17 and the far more capable MiG-21, phased out of front-line units within roughly a decade. China took the opposite path. Having begun licence production in the late 1950s, the Shenyang Aircraft Factory turned out the J-6 in very large numbers — commonly cited figures run to several thousand aircraft — and kept refining and building it into the 1980s. Cheap, tough and easy to operate, the J-6 and its F-6 export version became a mainstay for many smaller air forces. China is generally reported to have retired the last of its own J-6 fighters from front-line use around 2010, with some export operators flying them a few years longer. Precise production totals and retirement dates vary between sources.

The MiG-19 was a Soviet state product and the J-6 a Chinese one; neither was sold on an open commercial market, so no firm flyaway unit price exists in the public record. The Chinese-built F-6 was widely regarded as an inexpensive fighter — one of its main attractions for smaller air forces — but concrete per-aircraft dollar figures from the period are scarce and inconsistent. No credible cost-per-flight-hour figure exists for the type in open sources. Any precise dollar figure attached to a MiG-19 or J-6 should be treated as an estimate.