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The SR-556 is a semiautomatic AR-15 style rifle manufactured by U.S. firearms company Sturm, Ruger & Co. 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. It is one of several 21st-century AR-15 rifles to use gas piston operation (SR-556). In January 2016 Ruger discontinued all SR-556 rifles and introduced a new takedown variant with a lightweight KeyMod handguard.

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  1. WhyElKay

    Eliminate or reduce gas blow back?

    Can I do anything to reduce or eliminate the gas that blows right back to my face after firing or should I choose a different rifle? Suggestions appreciated. Thanks Ruger AR-556 MPR
  2. jlhopwo

    Can I buy local upper with BCG to mate with my Ruger AR-556 lower?

    So I've had this Ruger AR-556 for about a year, great gun. Except the carbine style front grip/front sight gas tube... I was thinking about buying new AR, 16-18" barrel, with grip that extends all the way, some nice ones out there, even local, like ORW-15. But I already have a lower... can I...
  3. CountryGent

    Scope & Mount Recommendation for an AR-15?

    Howdy all. I am thinking of adding a scope to my AR-556. I do pretty much all of my shooting with iron sights, so it has been a while since I've invested in optics. As such, I'd value some input on the topic. As for the "what for" question: Target shooting and plinking. If/when my schedule...
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