oldwun
If you cut the hull just above the brass, it is the thickest there, it will slide over the end of the bolt where the Remington weather shroud fits. then you cut it length and drill a gas hole in the side... Do you have a Remington weather shroud? you can use it for a pattern. Let me know I have got 6/10 of these 20 guage shrouds made up already....