Rock River Arms Announces the RRA .17 HMR

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):75 lbs. / 3.1 kg
Length (stock collapsed):5 in. / 85.1 cm
Included Accessories:one (1) magazine, user manual
MSRP:$1,300