Ruger's SR-556 Takedown features front and rear folding iron sights. The front sight is both elevation- and windage-adjustable, allowing the zero to stay with the barrel when you swap it out. The chrome-plated, two-stage piston with multi-stage regulator which provides a cleaner, cooler running, reliable firearm with superior operating endurance. Its trigger is a two-stage trigger that offers a smooth, crisp, 4.5 pound trigger pull. It features a full-strength hammer spring for consistent primer ignition and a lightweight hammer that enables a 30 percent faster lock time over standard MSR triggers. A Ruger flash suppressor is provided, and the 1/2"-28 threaded barrel allows for standard muzzle accessories to be installed. Included is a convenient carry case, lock, three 30-round Magpul PMAG magazines.