This is one like mine:
So it looks like the 10 1/2" model above as far as the mounting configuration will go, built in rail just forward of the top strap.
The rail is standard Weaver?
"If someone has a gun and is trying to kill you, it would be reasonable to shoot back with your own gun." The Dalai Llama (5/15/01, The Seattle Times)
"That rifle on the wall of the labourer's cottage or working class flat is the symbol of democracy. It is our job to see that it stays there." George Orwell