https://www.ar15.com/forums/t_7_119/...M-1-Lower.html

Add it to this
https://www.ar15.com/forums/t_7_159/...47192#i5147192

Then add any of the 5 sets of Colt Uppers, BCG's and charge handles @ $210 each, plus the scrap furniture in stock and I get a $700 ish Colt 6920

And it's all plug and play