Hello, what's the name of the tool that can screw on the ring that holds the forearm in place on a Rem 870 pump? Where can I buy one? Thanks. Happy Thanksgiving!

This might be what you need:

http://www.brownells.com/aspx/NS/store/ProductDetail.aspx?p=968&title=REMINGTON%2fMOSSBERG+FOREND+WRENCH

Or this:

http://www.brownells.com/aspx/NS/store/productdetail.aspx?p=8873&st=590-016-008&s=21981

Bye
Jack