Here I have an ICS C7A2 type gun which is a little off with the paint and not having the elcan but that can easily be changed. The base gun is an ISC split gearbox M16. Internals: -perfectly shimmed 16:1 gears which are SS 2 teeth -guarder o ring air nozzle -element piston head that makes perfect seal with full cylinder -full metal rack piston with teeth shaved off for AOE - ball bearing spring guide - evike M120 spring - random plastic piston head that seals perfectly and has a washer behind it for AOE - custom built frankintorque motor which gives amazing trigger response and a good ROF - new gen ICS mosfet - Modify Metal HopUp unit with basic bucking (can flat hop of asked for) - 6.03 barrel Can send more pics and shooting videos. HMU w any questions and what not :)