Kalashnikov's automatic rifle model of year 1947. The AK-47 assault rifle designed by Mikhail Kalashnikov in the 7.62x39mm M43 cartridge. Simple vector drawing.
http://www.flickr.com/photos/sovietreality/
better versions you can find by rones:
http://www.openclipart.org/detail/161821/labor-poster-fixed-by-rones
http://www.openclipart.org/detail/161827/labor-poster-are-drawn-anew-by-rones