Frog Engineering shows the results of their L119A2 built using the HAO L119A2 Kit with the Tokyo Marui MWS GBB as the base gun. The HAO L119A2 Monolithic (IUR) full kit for Marui MWS is a true monolithic upper receiver with a handguard, crafted from tough and slim 7075-T6 alloy. This kit also includes a very accurate L119A2 type lower, designed with meticulous attention to detail to satisfy true SAS enthusiasts. The L119A2 IUR upper kits are CNC machined from an Alloy 7075-T6 billet, the same material used in real firearms. The kit features a 10" one-piece steel gundrilled barrel end with a 1/2-28RH thread, a CNC machined L119A2 style gas block, a full RS spec steel-made barrel nut, and a hydraulic pressed heat shield, among other components.