Aero precision m5e1 assembled upper receiver

[brayten.thaddeus@gmail.com]

So, while working on my build I accidentally purchase an aero precision m5e1 (ar10 size) receiver when I meant to buy an m4e1 upper. So I'm looking to correct my error and sell the upper. It's new in the box, I didn't open it (seeing that is was the wrong part). Please dm me if you're interested.