Czechs arrest Iranian seeking U.S. M4 (AR-15) rifles

Czech public television is reporting that police have arrested an Iranian national suspected of trying to buy weapons with the goal of transporting them to Iran...the man was trying to buy 500 M4 rifles in the Czech capital. It says exports of such weapons to Iran are banned under an international embargo...
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Full story at ynetnews
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No information if these "M-4" rifles are semi-automatic or the full selective fire models (i.e. "machine-guns") or if the purchase was for pro-government or anti-government forces. There is also the possibility these weapons were sought so they could be used in an anti-USA propaganda operation..(S9)