Custom built has g and g 18:1 gears option one high torque brushless motor g and g compression and Shs bushings uses perun v2 hybrid. It has a krytac hopup with a g and g green bucking and 363mm tightbore inner barrel. For externals it has a Maxx red trigger a strike industries angled grip a matrix tan qd optic and not pictured it also includes a peq box. Will let it all go for 275$