DownUnder
Well-known member
I was only loading the first mag to 14 and the rest to 13. Still got plenty of double-feeds after a while. It's not that they are made of plastic.. The problem is that they are made of polymerized diarrhoea. P-mags are plastic and they are actually more durable and less prone to failure than USGI mags.
Used plastic mags in the military day in day out for years and never had issues. Its all in the material/build quality