Thanks for the info guys. Too bad the steel 30rnd mags are out of stock. I'm heading to Minneapolis this weekend for the big MWCA gun show, so I'll look there.
He has 2 mags that work very well, and a few others that do not. He had a Norinco AK in 5.56 before he bought the Arsenal, but those old mags don't properly lock, and don't feed reliably.
What are the marking that I need to look for on the Circle 10 mags?