Rock River Arms X-Series Rifles

With a just-fired case clearing the ejection port, and a second directly over the shooter’s shoulder, the rifle is still holding on target—a testament to just how effective the X-Series muzzle brakes are.

Rock River’s own 6-position Operator CAR stock offers twin rear-access storage compartments, dual ambidextrous QD sling swivel receptacles and a sloped cheek weld surface. A color-matched Hogue overloaded rubber grip is standard.

You’ll never achieve your full precision potential—or that of the rifle—if it comes with a creepy, gritty, stacky, piece-of-crap Mil-Spec trigger. Of all the good reasons to buy a Rock River AR, their in-house-designed, 2-stage trigger occupies the top spot on my list, and every Rock River AR—from least to most expensive—is fitted with this excellent trigger. The first stage, which consists of 1/8 inch of rearward travel at an average pull weight of 1.5 pounds, ends at the hard wall of the second stage. With the application of an additional 2.0 pounds of pressure, the sear breaks without any perceptible trigger movement. No creep, no grit, no stacking. Just a very nice, very consistent trigger with an honest 3.5-pound pull weight.

In the case of the LAR-6.8 X-Series rifle, the aforementioned 18-inch, heavy-profile, fluted stainless steel barrel is rifled at a twist rate of 1:10”, the exterior surface is bead blasted and the barrel is cryogenically treated for enhanced precision. The Hunter muzzle brake—also and RRA design—features four rearward-angled ports on each side, six forward- and two rearward-angled ports on top, and six forward-facing ports circling the muzzle. We found it to be really effective in minimizing perceived recoil, and it virtually eliminated muzzle rise altogether. The Hunter brake screws onto the barrel, which is threaded at 5/8” x 24 t.p.i.