They're p-mags, for better or worse, but definitely better. - Magpul Industries PMAG 7.62 AC - AICS Short Action Magazine, 5 Rounds, 7.62X51mm NATO

They're p-mags. So, they're pretty great. Are they the best? Mmmmm they're polymer so they're light and pretty durable but they're hardly indestructible. They work. And they're generally inexpensive. They're p-mags! Spend a bit more and get a few metal ones for consistency in feeding and tuning the feed lips, I guess, but I've never had any real issue with these. The only reason I won't give the full 5 stars is because - in theory at least - metal AICS patterned magazines are better. That being said, if you're looking for functional mags that are just going to work and you're not looking to spend over a hundred dollars per magazine.... these are the ones.