I ended up with an extra one of these (JP part # JPBC-4A) because of a backorder situation. I'd rather save it for a future build than take a low-ball offer, so please don't contact me unless you're interested in the following:
1) Paying $450, which will include insured shipping to your door if CONUS...additional postage if you are in another part of the U.S. or territories.
2) I'm interested in trading towards an unused MATEN ambi upper/lower combo. (That means .308!!!). I'd also consider a unused Rainier Arms .308 16" UltraMatch barrel towards a trade.
I know it's not the most exciting picture but just to show that this is truly NIB: