The Ruger AR-556 300 BLK utilizes a pistol-length gas system.

Ruger recently announced the release of the AR-556 rifle in its newest caliber, .300 Blackout. The Ruger AR-556 .300 BLK comes with a free-float handguard and several other upgraded components.

Ruger AR-556 300 BLK

The new rifle in .300 BLK features a 16.10-inch cold hammer-forged barrel with a 1:7-inch twist. It utilizes a pistol-length gas system to reliably function with both the lightest supersonic hunting rounds and heavy, subsonic rounds.

The rifle also boasts an 11-inch aluminum free-float handguard with Magpul M-LOK accessory attachment slots. It features a standard pistol grip for easy user customization, according to Ruger.

The dust cover and metal magazine feature markings with the caliber designation. This helps shooters identify the .300 BLK and not confuse the magazine with other calibers. The pistol-length gas system is tuned to run with a wide variety of ammunition, with or without a silencer. The 5/8-inch-24 muzzle threads are capped with a thread protector.

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Ruger AR-556 .330 BLK

  • Caliber: 300 BLK
  • Stock: Black Synthetic, Collapsible
  • Front Sight: None
  • Rear Sight: None
  • Overall Barrel Length: 16.10 inches
  • Thread Pattern: 5/8-inch-24
  • Feature: Free-Float Handguard
  • Handguard: Free-Float with M-LOK Attachment Slots
  • Twist: 1:7-inch RH
  • Overall Capacity: 30
  • Receiver Finish: Type III Hard Coat Anodized
  • Height: 7.20 inches
  • Overall Weight: 6.5 pounds
  • Overall Length: 33-36.25 inches
  • Length of Pull: 10.25-13.50 inches
  • Grooves: 5
  • MSRP: $819


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