• Ruger 90356 5.56 UPPER THR BBL

    Ruger 90356 5.56 UPPER THR BBL


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Ruger 90356 5.56 UPPER THR BBL

Factory New
Bud's Item #
Standard model 5.56MM with threaded-on flash suppressor. Overall length is 25.50 inches; barrel length is 16.12 inches with a weight of 5.73 pounds. Features a black anodized aluminum finish, folding sights, three 30 round magazines, rail covers, sight tool, soft case, manual and lock. Barrels are heavy contour (.850" under the hand guard), chrome lined, cold hammer forged 41V45 steel. Twist rate is 1 in 9, exterior barrel and gas block finish is Manganese Phosphate. Piston, regulator and gas block interior are chrome plated. Barrel threads are ½ inch-28 on 5.56MM. Flash suppressors without flats can be removed with a Torx T60 bit. Back up iron sights are Troy Folding Battle sights. Quad rail by Troy. Barrel is not free-floated; the system is pinned together and functions like a monolithic upper. Transfer rod is not user accessible.

The SR-556 Upper Receiver comes from the factory with a plethora of parts that are popular aftermarket add-ons to the traditional AR platform. These uppers feature an adjustable two stage gas piston system that significantly reduces the amount of fouling introduced to the receiver. The piston and gas tube are both hard chromed to ensure long life and reliability. In fact chrome seems to be a common thread with the SR-556 upper. The bolt carrier, gas regulator, and barrel (hammer forged in-house from Mil-Spec 41V45) are all chromed. The barrel is available threaded or with permanent flash hider. Also featuring folding detachable iron sights, and quad rail forearm.

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