Custom built, heavily upgraded AEG. Comes with all attachments Fully reinforced CNC air seal (cylinder, head, nozzle and spring guide) and drivetrain components. (Gears, piston, ARL, cut off, etc.) 18:1 ratio CNC gears Full metal teeth piston Microswitch trigger board Krytac 30k motor G&P hop up with 363mm TBB PRICE IS SHIPPED AND FEES INCLUDED