The base gun is a matrix calico Jack with the electronic MOSFET, for aftermarket parts it has a full steel tooth piston, maxx double O-ring air nozzle, SHS 12:1 gear set short stroked by three teeth, rocket airsoft aluminum cylinder, tuned flat trigger, a tienly GT-30000 motor, SHS aluminum piston head, krytac hopUp bucking and nub, polished brass barrel and a dytac pistol grip. The gun is wired to the deans, includes Magpul vertical grip and aftermarket muzzle device. I also have several batteries and mags for this gun available for extra