It started with a proprietary process called Polygon Progressive Rifling, 6061 T-6 aircraft grade aluminum construction, and a specially designed barrel vent system. That was 1990, and the creation of the Armson Pro-Series barrel. Since then, Armson barrels have received more 4 star ratings and product awards than any other barrel in the history of paintball! The Armson STEALTH features the latest improvements in barrel design, incorporating Microporting to reduce noise, while properly venting unspent propellant. Armson's new state-of-the-art production facility insures that everyone can now enjoy the superior performance that all Armson barrels deliver. Find out why Armson barrels are considered "The Most Accurate Barrel in the World". *** NEW - the all New SSR Stealth Barrels featuring two piece Stepped Rifling contruction.