I had to go to Gunbroker to buy a Windham Weaponry R16M4LHRFT R16 M4FT Rifle from Tombstone Tactical. They might still have some in stock.
I paid a little more than retail but am happy so far. Of course, it is still being shipped.
Advice on new AR
Re: Advice on new AR
I had to do the same thing (resort to GB), but it was close enough to drive over for a FtF.