In 5.56 NATO or .223 Rem. Wylde chamber. Rock River Texas XL free-float handguard in Magpul FDE, Barret Bronze or Burnt Bronze finish. Two-stage trigger, winter triggerguard, directionally tuned and ported muzzle brake. Has a mid-length gas system and low-profile gas block. Handguard has a full-length rail with 2.5" rail at 3, 6 and 9 o'clock. A2 or CAR stock, Hogue pistol grip. Introduced in 2015.