I have a Colt M4 upper, stripped. It is in Excellent to VG condition. It has almost no wear but has a very small amount of paint or moly on the top part on the rail at the front (you can see it in the photo). It is marked C AF, has M4 up front, has feed ramps cut, has proof marks, black. No RAS numbers. Email for more photos or questions. No Paypal. $160 shipped in the US.