I've run standard com-bloc steel, polymer bulgarian 40s, romanian drum, yugo, chinese, and a single of the cheaper all polymer pmags. So far they've all been good unless very badly damaged to the point you don't expect them to work 100%.
The chinese? or yugo? forget which, hold the bolt open after the last round which is nice. Forget which, maybe both? you can tell by looking at them because the back of the follower is flat, not rounded. They have the 2 ribs on the bottom of the sides, have to google that one.