Remove the top receiver cover. At the rear of the receiver, you'll see two screws which go through the tang and into the buttstock. Remove those. If you have the thumbhole stock, you'll also have to remove the screw from the bottom of the grip section of the buttstock.
As for installing a new stock, it depends on which one you get... some may require modification to the receiver, while others won't, although you might still have to grind down the tang to fit.
A collapsible rifle butt.
In front of the butt stock .
Take the butt stock off and look on the edge of reciever where butt stock attaches to. Thats where i found mine.
The stock...some have two piece wooden stocks - called fore stock and butt stock.
It is called the "butt stock".
I have a used "riot" 520-30 butt stock.
There are two small holes in the butt pad of the stock. Lubricate a Phillips head screwdriver into the holes and remove the butt pad. Using a long flathead screwdriver remove the screw in the center of the stock. To add new stock simply reverse.
The anagram is butt (posterior, end of gun stock).
Best left to a gunsmith
Butt of the stock rests in the crook of your elbow.
Yes
Recommend you leave this to a gunsmith.