DRD Tactical is excited to offer P556 upper with a quick change barrel without any tools. P556 upper will allow any standard AR type rifle to have quick change barrel and a compact carry capability. P556-FN model comes with 16″ FN Hammer Forged chrome lined barrel and flash hider. P556-LW model comes with 16″ Lothar-Walther… Read More »DRD Tactical AR-15 P556 upper