New Pearce Armoury Tapco t6 to m4 stock adapter. It arrived today and I did a test fit. It looks as if it's made out of carbon fiber plastic. Works with milspec buffer tube and end plate so far but can work with a magpul prs stock. Here it is with a magpul ctr.
I ordered it 2-27-17 and it arrived today 3-13-17 from Canada.