I second Attitude. Used them many times, they're really good. I wouldn't worry too much about getting feminized if they're out of stock, get the regular, sex them when they pre-flower (about 6 weeks into vegging) and keep a mother plant if possible. In my experience none of the "other AK's" can compete with the genuine Serious Seeds AK-47.
Personally I prefer regular seeds over fem'd anyway, if you're looking for an alternative indica that performs extremely well and is easy to grow, I'd recommend Sensi Seeds (or White Label) Super Skunk; short flowering, heavy producer and damn strong smoke!
This is Serious Seeds AK-47:
https://www.rollitup.org/hydroponics-aeroponics/589577-ak-47-custom-diy-aero.html
Peace