Type 56 assault rifles are sold all over the world, but no one uses Flight 56. Why?

There are many, because the number of machine guns is less than one tenth of that of rifles, so the cameras are basically rifles. After the introduction of AKM, its prototype RPD was replaced by the extremely strong RPK of AKM. Because RPD replenishes ammunition with bullet chains, it is very troublesome to replace the bullet chains, which also makes the structure of machine guns complicated. PRK is a long gun tube of AKM, and most parts are common with AKM, so wool has long eliminated RPD.