The Heckler & Koch VP9A1 Push Button X-B (Crossover) 9mm Pistol marries the compact 4.09-inch slide of the K model with the full-size grip frame of the F model for the perfect balance of concealability and duty-grade capacity. This striker-fired handgun replaces the traditional finger grooves with a clean, universally comfortable front strap and incorporates an integrated flared magwell for smooth, rapid reloads. Equipped with an optics-ready slide cut out of the box, it seamlessly accepts factory adapter plates to mount your preferred red dot sight footprint. The "B" designation indicates a highly requested, traditional American-style push-button magazine release rather than HK's classic paddle system. Shipping with one flush-fit 17-round magazine and one extended 20-round magazine, it delivers high-capacity versatility immediately standard from the factory.