Many of the Warsaw Pact states and China were permitted to build copies of the Kalasnikov. AIR, only China had to actually sign a licensing agreement. The others were building the guns ostensibly for the use of their armed forces and police forces under the treaty that created the Warsaw Pact. Why should the Russians be astonished that those nations never stopped building these guns?
What's worse (if I'm not mistaken here), under international copyright law, the practice is perfectly legal, since the copyrights were in effect waived when these nations were allowed to produce the weapons...

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