The rifle’s 18-inch, stainless steel fluted barrel is fitted with either the RRA Hunter Muzzle Brake (shown) or the RRA Beast Muzzle Brake with added “breaching spikes” on the leading edge.
The rifle’s 18-inch, stainless steel fluted barrel is fitted with either the RRA Hunter Muzzle Brake (shown) or the RRA Beast Muzzle Brake with added “breaching spikes” on the leading edge.

The rifle’s TRO-XL Extended Free Float handguard offers a 38-slot top rail that aligns perfectly with the upper receiver’s top rail in both the horizontal and vertical axes. Machined from aerospace-grade aluminum alloy, it is octagonal in cross section, with the 3, 6 and 9 o’clock flats drilled and tapped for the addition of optional 2-inch or 9-inch TRO rail sections.

With its modular design and detachable rail sections, the X-Series forend offered plenty of real estate for our needs. Pictured from front to back are a Magpul MS1 sling and RSA QD mount, Harris bi-pod, Magpul MBUS Pro front sight and LaserMax Uni-IR infrared laser.
With its modular design and detachable rail sections, the X-Series forend offered plenty of real estate for our needs. Pictured from front to back are a Magpul MS1 sling and RSA QD mount, Harris bi-pod, Magpul MBUS Pro front sight and LaserMax Uni-IR infrared laser.

Furniture consists of a hand-filling Hogue overmolded rubber pistol grip, and an Operator CAR 6-position collapsible buttstock of RRA design. It features enhanced cheek welds, two quick-detach sling-swivel receptacles on each side, and an innovative rubber butt pad that slides off from the heel exposing two 5/8” diameter, 5.5” deep battery storage compartments. Overall length is 40.0” with the buttstock fully extended/36.5” collapsed, and empty weight without magazine is 7.8 pounds.

For reliability testing on our Salute Products steel-plate targets, we mounted a set of Magpul MBUS Pro steel backup sights on the top rail. In firing over 100 rounds, the LAR-6.8 X-Series ran just like we’ve come to expect from Rock River ARs—like a top, with no failures of any kind.

RRA-X-Series-09For accuracy testing from the bench at 100 yards, we mounted a Nightforce NXS Compact 2.5-10x42mm riflescope in a Nightforce one-piece mount. The only 6.8 ammo we had on hand for testing was Federal’s XM68GD 90-grain Bonded Soft Point, which we’ve always found to be a top performer. The Federal XM68GD and the LAR-6.8 X-1 were best buddies right out of the box, and the combination turned in an extraordinarily tight, best 3-shot group of 0.215″ center to center. The largest group printed 0.83″, with the average group measuring was 0.53″.

See the X-Series rifles at your firearms retailer, or for more information contact Rock River Arms, Dept. OT; Tel.: (866) 980-ROCK; Web: www.rockriverarms.com