I have had 2 of these magazines, and never ever had an issue with them. Problem is, I am a nice guy and I gave them to a guy and his son with the plan to purchase more. Now that I am looking, none to be found.
I have tried different magazines and they all fail the feeding mechanism, even after thoroughly cleaning the rifle. I have used it only for times just to try it. Very disappointed. Would not recommend the rifle nor the magazines.