Description
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-“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 thanfles, 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 gripCatalog Number: SR-556E | Model Number: 5912 | Caliber: 5.56mm NATO/.223 Rem.Stock: Black Synthetic, CollapsibleFinish: Black Oxide/Hardcoat AnodizedSights: NoneHeight: 7.25″Barrel Length: 16.12″Overall Length: 32.75″ – 36.00″Width: 2.50″Weight: 7.36 lbs.Twist: 1:9″ RHGrooves: 6Length of Pull: 10.25″ – 13.50″
Capacity: 30 rds
MA Approved & Certified: NoCA Approved: No





Maxim Defense MD-15 .300 BLK, 8.5" Barrel, Black, SCW Stock
Benelli Montefeltro Satin Walnut Left-Hand 12 Ga, 26" Barrel, 12 Ga 26 Barrel, rd, 4 rd
Browning BLR Lightweight 308WIN 20" Barrel W/ Brass Bead Front Sight 4+1...
RUGER SR22, TUNGSTEN CERAKOTE, 2017 LIMITED EDITION
RUG 5801 M-14/5 223 BL WD 5R
SAV 22637 10BA STEALTH 308
REM 84015 700 CDL SF 3006 24 FLUTED
UTAS UTS-15 Dual Tube 12 Ga Pump 18.5" Barrel Cerakote Grey Tungsten 14rd
Browning X-Bolt Medallion 300WSM 23" Barrel 3+1 Left Hand Black Walnut...
Arsenal SLR-106UR AK Pistol, 556/223, Rail, 5 Rnd Mag
Christensen Summit Ti-Th 6.5 Creedmoor 24In 1/8 Aerograde Thumbhole Natural Carbon Finish Stock 6.5 Creedmoor
HENRY H001TMLB LEVER FRONTIER OCT 24IN 22MAG
Taurus 66 357 Mag, 4" Barrel, Hogue Lamo Grip, 7rd
RUG 5855 M-14/5P 223 BLKSYN 5R
SPG MA9226 M1A STD 308 SYN BL LOADED
Aero Survival Pistol 45 ACP 6.5" Barrel Olive Drab Green 13rd
SAV 22440 42 TAKEDOWN 22LR/410
WTHBY VDT306SR4O VGD 3006 SPRTR