Harrington & Richardson Retro 723 "Gordy Rifle". 16" 1:7 Barrel. Sons of Liberty Gun Works Lower. CMC curved match Trigger. Retro colt style 4x optic manufactured by Brownels. There is also a discontinued light mount that bolts into the ribbed handgaurd, and pressure switch. I have 200 rounds through it or so, shoots like a typical AR, its the lightest AR I own.