Great rifle. Uses KWA upgraded 2GX gearbox. Upgraded barrel to a Madbull Black Python Version 2 6.03 mm barrel (original barrel included too). NcStar hand guard weaver rail also installed. Includes rare artibal holographic site with night vision mode. Iron sights included as well as hi cap mag, 3300 mag battery, cleaning rod, unopened bag of G&G .28. Original box included.