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. gun.deals

    Ruger AR-556 5.56 NATO 16.1" 30 Rd 6-Pos Stock Threaded - $455.99 + $4.99 S/H

    Ruger AR-556 5.56 NATO 16.1" 30 Rd 6-Pos Stock Threaded - $455.99 + $4.99 S/H
  4. gun.deals

    Preorder - Ruger AR-556 MPR 5.56mm 18" 30 Rnd Multi-Purpose Rifle - $559.99 shipped

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    Ruger AR-556 .223 Rem/5.56 NATO 16.1" 30 Rounds Tactical Gray - $474.99 + $4.99 S/H

    Ruger AR-556 .223 Rem/5.56 NATO 16.1" 30 Rounds Tactical Gray - $474.99 + $4.99 S/H
  6. gun.deals

    Ruger AR-556 .223 Rem/5.56 NATO 16.1" 30 Rounds Tactical Gray - $474.99 + $4.99 S/H

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