The Zastava M70 is a 7.62×39mm assault rifle developed in Yugoslavia by Zastava Arms. Due to political differences between the Soviet Union and Yugoslavia at the time, namely the latter's refusal to join the Warsaw Pact, the M70 was an unlicensed derivative of the Soviet AK-47, specifically the Type 3 variant. As such, Zastava was unable to directly obtain the technical specifications for the AK and opted to reverse engineer the weapon. The M70 has unique in-built features that enables it to fire rifle grenades. These include a thicker receiver, a new latch for the dust cover to ensure it would not be jarred loose by a grenade discharge, and a folding grenade sight bracket over the rifle's gas block, which also shuts off the gas system when raised.