Designed to fit any firearm using 9mm Beretta 92 magazines. Constructed of steel, with the base of the magazine is encased in a high tech polymer sleeve. A high-tensile strength compression spring provides long reliable life. Specifications Weight: 0.3lbs Compatibility: Beretta 92FS / M9 Caliber: 9x19mm Capacity: 30 Rounds Body Material: Steel Spring Material: Music Wire Finish: Cation Electrodeposition Coating