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Though quite obviously based on a Kalashnikov-pattern rifle, the AKMSU, long rumored to have been a "secret" Soviet assault rifle, is in fact [https://www.thefirearmblog.com/blog/2018/08/10/the-legend-of-akmsu-mysterious-ak-that-never-was/ an extremely well-made Khyber Pass copy]. It has fooled the world (including Russian weapons experts and defense analysts!) for many years into looking like an IZHMASH-produced, Soviet-designed weapon. As such, the rifle is considered to be both Soviet and Pakistani; the former because it is an AK, the latter because it was most likely created in Khyber Pass. The author would like to salute this unknown legendary gunsmith for having fooled us all for so long, and for having created the world's most famous Khyber Pass firearm copy.