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.
Glock OEM Magazine, 9MM, 15Rd With Mag Block, Fits GLOCK 17/34, Cardboard Style Packaging, Black Finish MF17015B
