Been using +2 magazine extenders (with the stock mag springs) on my Glock magazines for years and never had any problems. In addition the the 2 extra rounds they give, they also make tactical reloads easier as they give me something extra to grab onto as I remove the partially-empty mag. Is there anything that I need to know about them that might make me change my mind about using them? What I'm after is maximum reliability out of my pistols. Wanna kill these ads? We can help!