Ruger AR-556 223 Rem 5.56 NATO Ruger SR-556 AR-556 10rd Detacha $ 13.45 Ruger® Rapid Deploy folding rear sight provides windage adjustability and pairs with the A2-style, F-height, elevation-adjustable front sight for a solid, reliable aiming system. The rifle was introduced in 2009 in 223 Remington/5.56×45mm NATO and as a .308 Winchester AR-10 variant in 2013, the SR-762. Ray R January 24, 2021 At 05:32. I put the magpul UBR Butt-stock on it and have never done anything else to it. Me and my pop both have the ar 556.. greattt gun and easily the best in the budget class.. imo .. shoots slight more accurate then s&w / psa .. and reliable as can be. (Photo: Andy C) Of note is that this is a piston-system AR-15 from a reputable manufacturer at a pretty good price. Love mine Serial # 859-13XXX Shipping cost is $45 and includes shipping insurance to the CONTINENTAL US. I hate the AR-556 because ruger discontinued the piston driven 556e model I love mine. For those just hearing about it, the Ruger SR-556 is Ruger’s new AR-style rifle that uses a two-stage piston rather than direct impingement, which promises greater reliability. In the interview, Wilkinson states that they have been running one of the SR-556’s without cleaning or lube for 15,000 trouble-free rounds. People are telling me not to buy a piston operated AR because of the so called carrier tilt problem. Ruger AR-556 5.56 NATO M4 Flat-Top Autoloading Rifle with Barrett Brown Cerakote Finis The SR-556 is an AR-15 style semi-automatic rifle manufactured by U.S. firearms company Sturm, Ruger & Co. Greetings Ruger Fans ! I am purchasing soon a Ruger SR-556. Ruger AR 5.56 Nato – 223 Rem 8529 16”, 1 30 rd mag, optic ready, new in box. Setting #2 is the normal setting. Ruger no longer makes these. I will be my first gas piston opperated AR. Ruger’s piston AR design has a four position gas regulator allowing for the user to completely cut gas off (Setting #0) in effect making SR-762 a manually operated rifle up to Setting #3 with the widest orifice in case the rifle is extremely fouled or underpowered ammunition encountered. Dealer let me shoot a ruger sr 762 and said if this piston AR 10 does not make you hard I will knick 300 bucks off the sig you want but sold out of before you got here. Made from 7075-T6 hard-coat anodized aluminum forgings, shot-peened and proof-tested 9310 steel bolt, and 8620 steel bolt carrier. Ruger’s SR-5.56E is a piston-system AR-15, featuring a four setting regulator. The Rifle has never been fired since I bought it. Built off the SR-556 design, the E model is operationally identical to the original Ruger AR. Ruger SR-556 FB Rifle AR-15, 16” Barrel 2 stage adjustable Piston. Reply. Comes with a Ruger soft case, 1 magpul magazine, original Ruger Butt-stock and Ruger Troy Industries flip up sights. It runs via a two-stage piston, which the company claims delivers a smoother stroke to the bolt carrier. Since he knows me and I am serious I shot 40 rounds if factory ball and match 308 &762, walked off … It is one of several 21st-century AR-15 rifles to use gas piston operation (SR-556). I have tried to find out if this is a problem with currently produced SR-556's.