there are 14 standard variants of the ak rifle, not including specific variants made by other countries
There are estimated to be well over six million AKs of all types out there (-47, AKM, AK-74, and other AK derivatives, such as the Zastava M21).
The ak series
Estimated 90 million AK-47's alone.
Dozens
Yes
The AK-74 typically uses a magazine that holds 30 rounds of 5.45x39mm ammunition. Standard magazines are designed for this capacity, although variations exist, including drum magazines that can hold more rounds. The 30-round capacity is a common feature for many assault rifles.
First in Soviet Union, now too many countries and places.
Yes, they are.
AK
No. AK pattern rifles are specifically banned. You can, however, buy a Vz. 58 pattern rifle.
Kalishnikov...it is the name of the Russian who designed the AK-47.
The advantages an AK-47 or AKM have are:inexpensivetolerant of mistreatmenteasy to learn and operateIt does have disadvantages, too, however.