I have a 2A Armament Xanthos Lite upper and lower receiver set. The set is a blem set. The detent spring hole for the take down pin is not in the correct location. I also have a 2A 15" M-lock rail with barrel nut, 2A titanium take down pins, 2A buffer tube shims, port cover and rod, and a Aero Precision lower parts kit minus the FCG and grip. This is over $700.00 in parts. I will sale as a package set for $600 shipped to FFL.
https://www.2a-arms.com/product-p/2a-xrvc-15.htm