I run the T-57s from Keepshooting in my SOCOM, they are as good as the old T-57s, and weigh the same as my US GI mags. And for the price point they are the best deal on the market. They are Teflon coated which I'm sure makes them more reliable in feeding, but the look on the outside is a little glossy for my liking. I'd put these up against any GI, Chinese, or original T-57s......they are good to go.