Semi-Auto Thompson Stock Adapter...

[ithacaartist]

Too late. Here's what I have so far. I had a machinist do the milling and adapter plate fab, after all, for $180. My only gripe is that he apparently went a few thousandths too far and had to relieve the rear end of the lower enough to remove the bluing in that area. I took he hardware for the stock to GunBlack, in Interlaken NY, were it was cleaned up by an acid dip, then re-blued. I didn't bother with the pitting and simply had them blue right over it. At least my notion that it would not show the damage when installed proved out!

If I had it to do over again, I'd probably do it myself. The adapter plate is simply a piece of 1/8" x 1", and the milling could be supplanted by first sawing out the bulk of the material that needs to go. Next, I'd use a body grinder to get closer, then carefully true it up and finish it off with file work. The placement of the holes is arbitrary, within bounds, so no biggie there--just need to flush off the ends of the fasteners if they protrude into the top, inside of the lower, where they need to avoid the bolt body.

I think my machinist guy would do it again, but I wasn't all that happy dealing with him. He never answered an email, took forever to get to it (then it was completed, overnight) and I got the impression he wanted more $. At least this approach was more economical than sending it to a Thompson specialist, which made the small goof easy enough to swallow...

Originally Posted by sheepherder

Seller on GB has a new Numrich/Auto-Ordnance buttstock for sale...
http://www.gunbroker.com/Auction/Vie...Item=424789427...

Nope, sorry Rich, the one pictured in this listing is the non-removable type for the '27 style. Its front end is curved differently, and you can see on the inside where the cylindrical lug that hangs down from the lower is accommodated, along with the extra meat. I already have two like this--the one original to the carbine, and a new, unissued one without any hardware or finish. It is in better condition than the G.B. offering, and cost me $30. I bought it by mistake,thinking it was what I needed.