Cold hammer-forged barrel with innovative coating for extreme long life. A2 birdcage-type hider to control muzzle flash. Adjustable two-position gas-piston-driven system for firing suppressed or unsuppressed. Tool-less quick-change barrel system available in multiple calibers. Multi-caliber bolt carrier assembly quickly and easily changes from 223/5.56mm NATO to 6.8mm Rem SPC. Free-floating MIL-STD 1913 monolithic top rail for optic mounting. Ambidextrous controls include magazine release, bolt catch and release, fire selector and non-reciprocating charging handle. High-impact composite hand guard with heat shield - accepts rail inserts. High-impact composite lower receiver with textured magazine well and modular grip storage. Folding and six-position telescoping high-impact polymer stock with rubber butt pad and sling mounts. Magpul MBUS front/rear flip sights. Ships in oversized hard case for accessory storage, includes 30-round PMAG.