Rock River Arms Announces the RRA .17 HMR: First Look – Firearms News

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Photo courtesy of Rock River Arms


Rock River Arms, the industry’s most respected name in Modern Sporting Rifles and pistols, is excited to announce the company’s first AR-platform rifle chambered for the .17 HMR cartridge. The new RRA .17 HMR joins the company’s LAR-22 rifle lineup to round out its rimfire long gun offerings. This rifle is ideally suited for rimfire fans looking for an accurate and reliable varmint buster or for a fun gun to ring steel across the .17 HMR’s effective ballistic range. Built upon the RRA A4 billet upper receiver and forged A2 lower, the RRA 17 HMR is fronted by a precision-manufactured 41V50 CMV 18-inch barrel rifled with a 1:9 twist. The cycle of operation is managed by a gas impingement, delayed blowback system that delivers reliable cycling of 15.5- to 20-gr. cartridges.

Adding to the precision barrel is RRA’s NM Ultra Match 2-stage trigger—a key ingredient to enhancing the shooter’s accuracy potential. The rifle utilizes a rear charging handle for convenient operation and comes with a winter trigger guard for use when wearing gloves. Further, fitted with an ergonomic Magpul MOE grip, adjustable Magpul MOE SL-K six-position stock, and RRA’s lightweight 15-inch free-float handguard with M-LOK compatibility, the RRA .17HMR is adaptable to the shooter and is ready to be outfitted with essential accessories like a bipod, lights, thermal, and optic. A 10-round magazine is included.

RRA .17 HMR Specifications

  • Upper Receiver: RRA A4 7000 Series billet
  • Lower Receiver: forged A2, 7075 T6
  • Barrel Chamber: .17 HMR
  • Barrel Length: 18 in. / 45.7 cm
  • Barrel Material: 41V50 CMV
  • Muzzle Thread: ½-28
  • Twist Rate: 1:9
  • Muzzle Device: A2 flash suppressor
  • Method of Operation: gas impingement with delayed blowback
  • Charging Handle: rear charging, forged 7075 T6
  • Trigger Group: semi-automatic
  • Trigger/Hammer: NM Ultra Match 2-Stage
  • Selector: two-position (safe/semi-automatic)
  • Buttstock: Magpul Moe SL-K 6-position (Mil-Spec)
  • Pistol Grip: Magpul MOE grip
  • Handguard: 15-in. lightweight aluminum free -float with top rail and M-LOK compatibility
  • Magazine: 10-round magazine
  • Weight (magazine empty): 6.75 lbs. / 3.1 kg
  • Length (stock collapsed): 33.5 in. / 85.1 cm
  • Included Accessories: one (1) magazine, user manual
  • MSRP: $1,300

If you have any thoughts or comments on this article, we’d love to hear them. Email us at [email protected].



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