As always thanks for looking. This post isn't meant to the "google is your friend" community, we all know that, at this point, such remark would be almost a cliche.
Now, does anybody know of a good place (price wise) to buy the thing? I would really like to be able adapt an AR type stock to my new SWAT 522 rifle. info would be much appreciated.
Thanks again.
HTR.
There's a couple of choices, a genuine swiss version for a mere $55 which includes stock and tube. This is what I chose.
http://midwest-distributors.3dcartstores.com/SAN-Swiss-M4-Type-550-Series-Stock_p_32.html
Or you can go the DDLES for the adapter only...
http://www.shop.doublediamondsupply.com/AR-15-stock-adapter-for-SIG-556-Classic-or-522-rifles-DDSIGADTM401.htm
Then you need to buy the stock and tube etc.
Definately do the DDLES adaptor. It looks great, creates a nice cheek weld, and locks up tight. You will pay a bit more for it but the Swiss adaptor looks a little odd IMHO.

Exactly the kind of info I was looking for!
Thanks guys.
HTR.
It's dead simple! You just take a punch and knock the pin out. Make sure you don't lose the small spacer washer and remember where it came from: top or bottom of the stock.
Originally Posted By Rev-Rob:
How hard is it to change out the stock? How do you get the pin out?
Thanks for the link as I needed one of these.
I went with Double Diamond suppy and I am very happy with it. Quality and fit are fantastic and I recieved it only 3 days after my order!

Nice looking hardware there BravoMan