Magazine for KP-9 KR-9 (Vityaz) by Kalashnikov USA 9x19mm 30 rd capacity Black. Made in Russia, limited quantity.

If 30 round magazine is too long for your application, this magazine can be cut down to 20 or 10 rd capacity and the floor plate can be moved up (Note horizontal ribs, that is where floor plate would slide in to).

Also, this magazine works with AK-74 stripper clips (speed loaders). Note that the magazine has cut-outs at the top of the body where it goes in to the mag well. That is where the speed loader ramp would get plugged in. Speed loaders are also available here:

https://www.akstuff.com/index.php?route=product/product&path=25_31&product_id=216