Heckler Koch Magazines are divided on the basis of their caliber and capacity. Available calibers include .357, .40, .45, 5.56, 7.62, 9mm and 9x19. Magazine capacity denominations, on the other hand, comprise 8, 9, 10, 12, 13, 15, 16, 18, 20 and 30. You can buy Heckler and Koch Magazines on sale that best suits their needs and requirements.