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http://www.forgottenweapons.com/submachine-guns/danuvia-39m/
So apparently the Hungarian designer developed an 'almost' assault rifle in 1937, getting the Hungarian army to adopt it in 1939. It used a lever delayed blowback principle that was in effect the same as the later roller delayed blowback design of Mauser-CETME-H&K, excepting using a lever instead of rollers to achieve it's recoil function. That same principle was successfully applied to the FAMAS assault rifle an much improved version of the AK-47 that wasn't adopted supposedly out of no fault of it's own: https://en.wikipedia.org/wiki/TKB-517
So what if rather than using the 9mm export Kiraly develops a cheap, reliable, accurate rifle based around an intermediate round? Would the Hungarian army adopt it as a service rifle and would anyone else in the Axis or would it be a NMH situation?