Yes, in short. I also suggest you read up a bit more before you go any further. This spacer plays an important part in the fitting and assembly of the fore-end. Can someone a bit more computer literate than me tell him how tro find the thread that deals with the collar and how to adjust it properly

It's not the king screw either. That can get a bit confusing. It's exactly what it does. It's the front trigger guard scxrew