Ruger SR-556 Takedown 5.56mm Semi-Automatic Rifle – RUGER FIREARMS – rugerarmsstore.com

The SR-556® offers Ruger’s legendary rugged reliability, and comes factory standard with a host of accessories that today`s shooters demand. Employing a patent-pending, chrome-plated, two-stage piston driven operating system that provides the user with a cleaner, cooler running, reliable firearm that is truly state-of-the-art.