SR-556E Autoloading Rifle 5.56mm NATO/.223 Remington 16.12 Inch Barrel Black Anodized Finish 6-Position Stock A2-Style Pistol Grip
Features a round, lightweight adaptable handguard with a full-length Picatinny rail at the 12:00 position and an A2-style pistol grip with finger grooves. Two-stage piston with four-position adjustable regulator. Cold hammer-forged 41V45 barrel with black anodized finish, flash hider and no sights. Six-position telescoping M-4 style buttstock. A nickel-Teflon coated transfer rod. Includes soft sided case.
The new Ruger SR-556E® 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.
The chrome-lined gas block and chrome-plated piston and regulator work together to provide a smooth power delivery stroke to the bolt carrier. The by-products of the gas system are vented out the bottom of the gas block, away from the bolt carrier, keeping the action clean and free from contaminants. The end result is significantly improved performance over gas driven rifles.
Ruger Press Release April 29, 2011:
Sturm, Ruger Introduces The Ruger SR-556E, A Value-Priced "Essential" Two-Stage Piston Driven Carbine with a Lightweight, Adaptable Handguard
Sturm, Ruger & Company, Inc. (NYSE: RGR) is pleased to announce the introduction of the new Ruger® SR-556E™, a value-priced derivative of the popular SR-556®. The new SR-556E features Ruger's patent-pending two-stage piston and multi-stage regulator that runs cooler and cleaner than traditional AR-style rifles.
The Ruger SR-556E comes equipped with a new, lightweight, adaptable handguard which provides multiple options for mounting optics and other accessories. This new, round handguard features a full-length Picatinny rail at the 12:00 position, which aligns with the rail on the flattop receiver. The handguard also accepts sections of rail or handguard covers, which allow the user to configure the handguard to their exact requirements while minimizing size and weight.
The SR-556E still offers the basic features that make the Ruger SR-556 family a success. The two-stage piston operating system runs cooler and cleaner than gas driven rifles, and the multi-stage regulator allows the operator to tune the rifle to the specific ammunition. The cold hammer forged 41V45 barrel provides outstanding accuracy and longevity. The barrel is threaded 1/2-28 and is capped with the Ruger flash suppressor. The regulator, piston and piston bore are chrome plated, the transfer rod is nickel-Teflon coated, and the balance of the rifle is hard coat anodized or black oxide treated.
The SR-556E also features an A2-style pistol grip