Personally, I stick with AI-brand magazines for the most part. I used to own four Alpha Mags and they were great in that they held 10 rounds in a package that was shorter than an AI mag, it was less expensive, and it was American made. However I had significant issues with two of them to the point I didn't trust them, period and those advantages started to mean very little to me. I had numerous failures to feed with them that no amount of feed lip tweeking would fix and the service from Alpha Mag at the time put a sour taste in my mouth. I've owned six AI mags and with every one of them it was as simple as plug and play, there didn't have to be a tweeking of the feed lips, no feeding issues, just load it up and cycle the action. I still use two Alpha mags that have been proven reliable but I'll only buy AI mags from here on out just for peace of mind, even if they do cost a bit more. Just my $.02.