This gun was put together piece by piece and is basically fully upgraded. Externals are almost all brand new, and the only issue with this gun is that it is missing the charging handle. Shoots around 350 fps. Price is shipped. No trades. Parts list: Shs steel tooth piston Retro arms double o ring piston head Unknown brand double o ring cylinder head G&G 18:1gear set (not the cheap combat machine one) Ball bearing spring guide 7mm ball bearings Irregular pitch spring Gate Titan Mosfet Lonex o ring nozzle Zci ht motor Wired to deans Maple leaf bucking Madbull ultimate barrel Classic army body and hop unit G&p handguard and stock