Yugoslav AK47 vs Russian AK47?
The original Russian rifle was called AK, no number. The Yugo
rifle is really Zastava M70.
They fire the same round and the action is pretty much the same.
However, the M70 is heavier because it has both a thicker receiver
and a thicker barrel. This makes it a bit more accurate and reduces
felt recoil.
The Russian rifles have chromed bores and the M70 does not,
which means it must be cleaned with extra care when used with
military ammunition. Military ammo leaves corrosive residue which
can eat up the unlined bore.
Also, the M70 has grenade launching sights. They are kind of
neat, but given the absence of grenades on the civilian market they
are quite useless.