The best a (ban state) man can get - Magpul Industries PMAG 10/30 AR/M4 GEN M3 10-Round 5.56x45 Magazine

These Magazines are probably the best capped magazines you can get in terms of ergonomics and functionality you can get in a restricted state. Hexmags come close, sure, but the track record, and frankly, the polymer body used in Magpuls is a bit better. The body material is what you expect from Magpul: lightweight and tough as nails. These consistently feed well, and make it through training courses no sweat. Overall, you're getting the perks of 30-round mag ergos with compliant capacity. Not much more to ask for. The only problem is you're going to need more than you expect, because you'll be reloading all the time! Definitely a good buy. Highly recommended.