Quoted:
I believe that one was custom built by someone at Nodak Spud. I seem to recall that from when it was first posted awhile back. It is a custom built stock that was built off the Choate folding stock.
There is a guy here in AZ that custom builds them like that too. He cut down a Choate folding stock for me and rigged it for a 10/22 SBR. I prefer the folding stock to the AR style so I had him leave the folding stock part the way it was.
That would be me
I stumbled on this post. The piece that connects the rear M4 stock was made by ACE and I dont know if they still make them. But basically, you cut off the back of the Choate Stock, and attach that piece, then make a filler piece for the cutdown stock in front. I had one exactly like that for my SBR awhile back. Still think its cool. PM if you want one, I can still do them.......