Aero Precision AC-15 5.56 16" Mid-Length Rifle - $586 shipped after code "MER"
https://www.brownells.com/firearms/...=Avantlink&utm_content=NA&utm_campaign=Itwine
They also have the OEM model for $451
https://www.brownells.com/firearms/...=Avantlink&utm_content=NA&utm_campaign=Itwine
Both are really good deals.