Midway USA just had a few sales for Glock oem mags cheap-starting at $16.00 and have them every so often on sale. If you are going to use the mags for ccw, just buy the factory oem as they have a history of being good to go. I know others have stated other manufacturers mags are good but I don't want to bet my life on one. I am not trashing them but I would spend the little extra for what I know what works. You can also get sleeves for higher cap mags that cover the bottom of the mag.. It gives it a better feel in my opinion.