Custom valken v12 engine: this engine has all fresh new o rings, brand new Polarstar solenoids and another set of solenoids, purple low flow Polarstar poppet valve, stock nozzle that’s been bored out, lubed the internals recently, MRS Polarstar regulator, new green in gun line connect, pro win hop up also will be shipped with another good hop up, comes with tank and line as well, comes with 5 mags, 4 of which are high cap and 1 is a mid cap. Will also come with a 7.4 LiPo along with the charger for it.