Designed to fit your MP-5 pattern firearms chambered in 9x19mm. This magazine is constructed of steel with an electroplate finish Stainless Steel follower reinforced feed lips and a high-tensile compression spring.Specifications Weight: 0.3 lbs Compatibility: MP5 / SP89 / MP5SD / HK94 Caliber: 9x19mm Capacity: 20 Rounds Body Material: Steel Spring Material: Music Wire Finish: Cation Electrodeposition Coating