Ruger SR556 Rifle Chambered in 6.8SPC

Sturm, Ruger & Co., Inc. (NYSE:RGR) is pleased to announce…

Sturm, Ruger & Co., Inc. (NYSE:RGR) is pleased to announce the new Ruger® SR-556/6.8, a new chambering in the popular SR-556 two-stage, piston-driven, AR-Style rifle. The new SR-556/6.8 brings the power and downrange authority of the 6.8 SPC cartridge in a two-stage piston rifle that runs cooler and cleaner than traditional gas-driven, AR-style rifles.

Packaged with one five-round magazine and two twenty-five round magazines, the SR-556/6.8 is an ideal hunting rifle for those who appreciate the versatility of the customizable and ergonomic AR-style platform. The 6.8 SPC has ample power for hunting medium-sized game, and the greater muzzle and downrange energy enhances the capability of the SR-556 in defensive or tactical roles as well.


The SR-556/6.8 retains all the features of the original SR-556® that make it an outstanding value in the AR-style rifles. The patent-pending, two-stage piston delivers a smooth power stroke to the one-piece bolt carrier, which softens recoil, aiding both shooter comfort and durability of the rifle. The four-position gas regulator allows the shooter to tune the rifle to the ammunition being fired and environmental conditions present. A chrome-lined, cold hammer forged barrel provides accuracy and longevity, Troy Industries Folding BattlesightsTM, Quad Rail and rail covers add considerable value to the package, as does the Hogue® Monogrip®, six-position stock, sight adjustment tool, and the padded carry case, all included with the SR-556/6.8.


The SR-556/6.8 maintains the mid-length gas system and the heavy (.850”) barrel contour under the handguard of the original SR-556. The 1:10 twist barrel has a standard SAAMI 6.8 SPC chambering, is 16.12” long, is threaded 5/8-24, and is capped with the effective and distinctive Mini-14/SR-556 flash suppressor. The SR-556/6.8 weights 7.75 pounds without a magazine.

For more information on the SR-556/6.8 or any of the other rifles, pistols, or revolvers offered by Ruger, please visit, or see your local firearms dealer.

Load Comments
  • Scott

    A 7.62×39 would be nice, or at the very least a specII chamber for the 6.8. I would like to own either if they were made available.

  • mike b

    theirs not enough of commercial 6.8 ammo out there so those of us who want to cross over to that cal. can enjoy it. i hope ruger decides to do 762×51 they’ll sell like hot cakes but that just my opinion. but i really want one for the same price as the original sr-556

  • GlenR

    Called Ruger support on the SR-556 6.8 with some questions. I have the SR-556 223 and am overall please with design and quality. Per support at Ruger it was easier to design 6.8 upper and keep the lower with little to no changes. While the 6.8 is bound to do well what I really wanted was a SR-556 in 308. Still waiting.

  • Tom

    1:10 rifling and a standard SAAMI chamber? This means buyers are doomed to using the low performance loadings. I wish the folks at Ruger had done some research to see what the evolution of the 6.8 cartridge has led to.