AK-47 is probably one of the most well-known Russian weaponry piece. They say it became so popular worldwide because of it's high durability (it can go for years without any kind of cleaning or special maintenance) and extreme simplicity - it has only eight moving parts and can be stripped down in one minute. In some countries of
Africa it can be bought as cheap as $12 for one piece and no any license is needed, so even children armed with the guns. Maybe that's why some of the countries of this continent have the AK-47 depiction on their coats of arms, like Mozambique on pictures above has it both on its flag and coats of arms.