AK-74
The AK-74 is a Russian made assault rifle. The letters AK stand for Avtomat Kalashnikova, which is Russian for  Mikhail Kalashnikov's Automatic Rifle. The AK-74 is a later version of the AK-47 that has a few new features.  The most important of these is that it fires a smaller cartridge, the 5.45x39.5mm Soviet.