It's a pretty sweet deal in my opinion. I really like the V1 upper. If you bought this upper and a PSA blem lower and built it out you'd have a heck of an AR for about $800.
If you keep your eyes open a Daniel defense lower will pop up every so often. If I had a need for this upper I would snag it. Those are original versions of the lite rail. They are very similar to the current RIS II rail which sells for over $400.00 alone.