The Chapius X4 is an exquisite firearm crafted from the rich tradition of European-style driven game hunting yet sporting a new, patent-pending technology that delivers a heightened level of precision and never-before-seen load adaptability.Double rifles have seen over a century of use for big-game hunting across the globe and are still favored by professional hunters and avid sportsman pursuing large and dangerous game. The X4 builds on that tradition while presenting a new barrel technology that solves the age-old challenge of barrel re-regulating when introducing new cartridge loads.Creating a double-barrel firearm involves an exacting process whereby the gun maker must align both barrels to achieve a consistent and precise point-of-impact while using a common sight picture. This regulation is typically based on a specific load (bullet weight, bullet shape, powder charge) and significant deviations from that load can cause the barrels to become unregulated, or, have different poi...