I have one M16A1 rerun and the XM177E2 rerun.

They are, by far, the best reproductions. Its worth buying for a clone project just for the lower as it is the only clone you will ever have that actually uses the original roll marking dies and looks factory.

I took both of mine and rebuilt them using an original new 1967 M16A1 upper and took the XM177E2 and rebuilt it with original new XM177E2 parts I had in my collection.