The AK-47, or AK as it is officially known, also known as the Kalashnikov, is a gas-operated, 7.62×39mm assault rifle, developed in the Soviet Union by Mikhail Kalashnikov.
Arsenal AD (Арсенал АД) is a Bulgarian joint-stock company based in Kazanlak, engaged primarily in the manufacture of firearms and military equipment.
Gas-operation is a system of operation used to provide energy to operate autoloading firearms.
A magazine is an ammunition storage and feeding device within or attached to a repeating firearm.
A rifle is a portable long-barrelled firearm designed for precision shooting, to be held with both hands and braced against the shoulder for stability during firing, and with a barrel that has a helical pattern of grooves ("rifling") cut into the bore walls.
The Wassenaar Arrangement Semi-automatic Rifles (more commonly referred to as the WASR-series rifles) are manufactured in Romania by the long established Cugir Arms Factory as result of a collaboration between Century International Arms and Cugir.
The 7.62×39mm (aka 7.62 Soviet or formerly.30 Russian Short) round is a rimless bottlenecked intermediate cartridge of Soviet origin that was designed during World War II.