An affordable alternative to factory OEM magazines, the Promag® CZ® P10-C 9MM 15-Round Blue Steel Magazine is manufactured to the same tolerances as factory magazines, but at a fraction of the cost. The heat-treated steel body features a corrosion-resistant black oxide finish for lasting durability. Plus, a heat-treated chrome silicon wire internal spring eliminates binding, ensuring the injection-molded polymer follower operates flawlessly for reliable feeding.