I have a Gen 4 Noveske Matched Receiver Set for sale. It has the ambidextrous parts and that is it. I bought it over a year ago to do a 300 Blackout build and decided not to.  I bought it from Bauer Precision in Denton,Tx I paid $775 for it at the time which is what their website still has it listed at. They were out of stock everywhere when I bought it.  My price is $775 obo.  You can call/text me at 785-820-0260