When you hear the word "combo" you know you're getting a little bit of both - just not necessarily the best of both worlds. But Armscor-Rock Island Armory wouldn't let you down. We combine the best aspects of two great calibers so you've got your choice of barrel. When it comes to packing a powerful caliber, the TCM TAC Ultra boasts a couple options for shooters, including 9mm and the Rock Island Armory favorite, 22TCM. It's a robust piece of equipment for any tactical shooter and brings with a sizable capacity at a 17+1-round capacity via a double-stack magazine. With the TCM TAC Ultra MS HC Combo, no matter your caliber selection, you've got a winner in your hands. It's been meticulously crafted for optimum hand fit and performance.