I just picked up my RRA Mid length  upper from UPS. This thing is very nice, fits my Bushy lower
perfectly, color matches nicely.  I am like a kid at Christmas, can't wait to shoot this bad boy. I just ordered a YHM BUIS today as well, hope it shows up quick.
Now I need to start saving for other goodies like rails, flashlight and optic.
A big thumbs up to Eagle Firearms, they were great to deal with. I sent in a money order for the mid length, but asked them to substitute a Stag M4 if the middy was out of stock. After I sent the M.O. I checked their website and it said the Middys were out of stock, so I was expecting a Stag. I'm very happy that I received my first choice, though I wouldn't cry about receiving a Stag.
Just thought I would share and thanks to all of you for your info and pictures of mid lengths.

Mike