I have a Briley STC 10/22 that is based on the Ruger 10/22. The only Ruger part left is the aluminium receiver. I can see that the aluminium receiver could have problems supporting the 21" long stainless bull barrel without the additional support. Briley solves the issue of needing extra support for the heavy floated barrel by attatching the weaver rail, both to the receiver and to the barrel. I have had no reason to remove the barrel since Briley built it, but it looks very solid.
On the subject of the rubber/polyurathane bolt buffer pins for the 10/22. I like them. They prevent the bolt pin holes in the receiver from goose egging and the also make the action noticably quieter.
Chuck
[This message has been edited by chucko (edited September 18, 1999).]