Worth your money - Magpul Industries PMAG GL9 Glock 17/19/26/34/45 9mm Luger 17 Round Pistol Magazine

Normally, I would stick to OEM mags for the reliability factor, but I would consider these just as reliable as the OEM mags. I have been using them for just about 2 weeks now, 2 range days, several hundred rounds, running reload drills, letting them fall in the desert sand, and I have had no issues with reliability whatsoever. You get about the same reliability as the OEM magazines, for a third of the price.