B&T B&T USW-A1 9mm Luger 30 Round Pistol Magazine Black 30RD. These high quality factory magazines hold 30 rounds of 9mm ammunition. Specifications for B&T B&T USW-A1 9mm Luger 30 Round Pistol Magazine: Manufacturer: B&T Caliber: 9mm Luger Magazine Capacity: 30 Round Color: Black Factory Original Package Contents: B&T B&T USW-A1 9mm Luger 30 Round Pistol Magazine B&T BT-430103-30RD: B&T USW-A1 9mm Luger 30 Round Pistol Magazine Black