Long internal barrel in a stock larger than an M4 due to the 'bullpup' layout that puts the magazine behind the trigger. This is Jong Gong's competition spec electric airsoft version of the AU-1G. Includes the authentic two-stage trigger system, pull it halfway for semi-auto and fully for full auto. Reinforced piston head and V3 metal gearbox. Externally it has the Steyr modular system, release a couple of catches and it disassembles into 3 sections.Included in this bundle is a battery, charger and ammo.