You would have heard of AK-47 rifle...bt do u know why its name like that????Lets Find out!!!

AK-47 is probably one of the most well-known Russian weaponry piece.
where

A = "Avtomat" (which means Automatic in Russian)
K = "Kalashnikov" (man who designed the weapon.)
47 = First designed in 1947

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.