pws mk111 pro piston upper on an aero lower. Magpul pro buis, vortex red dot, larue mbt2s trigger, bcm kag handstop, strike industries ambi safety and dead air keymo. Has maybe 50 rounds through it. Built a 13.7 pin and weld and it just sits in the safe. Asking 1300.00 shipped from my ffl to buyers ffl.