Any good surplus mag that is not too beat to hell. Izzy, steyr, imbel, fn, they are all good imho. Stay away from the dsa usa mags, too many bad reports.
The new korean mags have been getting some good reviews.
I have 10 mags very good to excellent condition that I will let go for $20 each as ONE LOT. Plus shipping around $12 Flat rate or meet in Gonzales/Prairieville area.