I ordered two of the five round mags that are size specific and you might know they would come out with a new one that holds both sizes. I also ordered three ten round mags and they hold both sizes, but no matter which one I use, each mag works like a charm. So if these new five rounders work as good as the others, buy them! American Arms still has the price too beat. Sorry if this shows up more than once, having trouble submiting.