Don't bother with them. Only the ones made by Glock are reliable.
No interest in owning a Glock or a high cap magazine. I had just never heard of such a large mag for a Glock.
Apologies for getting the thread off subject.
Brian.
"You set your own goals for success, and when you succeed it don't necessarily mean that you're going to be a big star or make a lot of money or anything. You'll feel it in your heart whether you've succeeded or not." - Roy Buchanan