Designed to fit your MP-5 pattern firearms chambered in 9x19mm. This standard-capacity magazine is constructed of steel with an electroplate finish, Stainless Steel follower, reinforced feed lips, and a high-tensile compression spring. Specifications Weight: 0.4lbs Compatibility: MP5 / SP89 / MP5SD / HK94 Caliber: 9x19mm Capacity: 30 Rounds Body Material: Steel Spring Material: Music Wire Finish: Cation Electrodeposition Coating