People I stand corrected don't go buy legal XCR-L 7.62X39 10 round magazines for your AR15 and put 13 rounds of 223 as they will not function properly. I just got the magazines this week for one of my AR 15's I converted to 7.62x39 and I stated that they took 13 rounds of 223/5.54 and they looked good but didn't try racking them yet in my AR 15 to see how they feed, well I did this morning cycling them through and they failed very badly. I hope know one went out and bought any based on my incorrect technical information sorry CGN Regular. Ended up buying just 10 round magazines in 7.62x39 and 223 today to stock up.