Systema ptw challenge kit from 2016. Has a centurion arms rail and a magpul motor grip. Also has an fcc 3.5 motor that is pretty much brand new in it. The rest is stock systema. Has a small knick in the black wire of the control cable. Doesn’t effect function. Also the pins are missing the detents and it’s missing the ball bearing for the fire selector. Shoots amazing. Asking $875 plus shipping.