This is a factory original, drop-free magazine for your Glock. Glock magazines have a hardened steel insert encased in high tech polymer. This polymer coating protects the magazine and prevents deformation, even when dropped from a great height. Technical Informaion:
NOTE: All current production Glock magazines are also compatible with all previous generations of Glock pistols.
Each GLOCK magazine is constructed from a hardened steel insert encased in high tech polymer to protect the magazine and prevent deformation" even when dropped from a great height. The high quality spring and follower ensure reliable feeding from the first to the last shot.