If it doesn't say Glock on the mag don't try to run it in a Glock, period. They've all been tried and all found to not work. Glocks run with Glock mags and only glock mags.

If you want more mag capacity, Arredondo, Dawson, and Taylor Freelance all make mag extensions for Glock mags that will extend the mag and work. Taylor Freelance even makes a 170 mm extension that can be used on a 40 cal mag. It will get you +8 on a G22 mag with addition of the extension and changing the spring to a Wolfe extended +10% strength spring. That's as good as you're going to get right now.

http://www.taylorfreelance.com/