Russia unveils world`s first `underwater machine gun` ahead of Winter Olympics

Sydney: Russian military has reportedly unveiled the world`s first underwater machine gun ahead of the 2014 Winter Olympics to be held in Sochi. The first ever machine gun, called the `ADS` is an amphibious assault rifle and can also be used to battle on land by a mere change of cartridge. The ADS is also equipped with a grenade launcher , making it an all-in-one weapon, which might help Russians protect the coveted Games, news.com.au reports. The report said that there is a possibility that the weapon could be a key part of the arsenal of security forces patrolling the Black Sea off Sochi.