Please stop punting out hearsay and opinions as facts.
The best mags are whatever feeds reliably in your own gun and fit your budget. Pmags don't work for everyone. MAG 190 round metal m4 magazines are very good, but not necessarily the same goes for everything they do. I've had very good results from dytac invader mags, others have had nothing but grief from them. Also, ASG flash mags are just rebranded Lonex ones.