These production magazines are made in South Korea and are a high quality, reliable third-party replacement magazine for a Glock . These magazines have a hardened steel insert which is encased in a high tech polymer (which is fully metal lined). The polymer coating protects the magazine and prevents deformation, even when dropped from great heights.Features :Fits GLOCK 21/30/41Polymer ConstructionMetal LinedBlack Finish26 Round Capacity