Looks like someone planned to make the things they imagined could well be a more fancy Armslist/Gunbroker. Didn't place plenty of work into it. We Specifically such as the created-in rear MBUS sights on many of the AR styles. The MBUS sights are adjustable and correspond to a regular A2 https://ammunitionsdistros.com/product/american-tactical-milsport-300-blackout-optics-ready-semi-automatic-rifle-with-mlok-rail/