The KA mags just need a bit of time to settle, run a few loads through them manually, add a bit of silicone lube and don't overload them or they jam, this is true of all their plastic mags I've tried.
The 7.62 pouches I use are by SORD, they make absolutely top notch kit!!
http://www.sordaustralia.com/SORD/in...t=1&c=02&p=730