The XTech MAG lineup is intended to not only meet, but go beyond the specs of traditional factory magazines. This includes a stronger and longer-lasting spring, improved follower, enhanced baseplate, and an extremely competitive price. Chambered in 9mm 17-round capacity Fits Glock 17 Gen4-compatible platforms Upgraded over Glock factory mags Steel-reinforced magazine body 17-7 stainless steel spring "No Stick" Delrin follower Durable proprietary baseplate material Lifetime Manufacturer Warranty