The Magnum Research MAG4013P Baby Desert Eagle magazine is a detachable model designed for .40 S&W caliber handguns. This magazine features a polymer base plate and has a capacity of 12 rounds. It is compatible with the full-size Baby Eagle (4.52" barrel) and semi-compact Baby Eagle Compact II and III (3.93" barrel) models.Key FeaturesCaliber: Chambered in .40 S&W.Capacity: Designed to hold 12 rounds.Included Components: Comes with a polymer base plate.Compatibility: Fits full-size and semi-compact Baby Eagle models II and III.