Here's a link to a picture of my FWB 65 for those that don't know what they look like.
Note in this picture mine is fitted with the manufacturer's barrel shroud to add weight. Here is a picture without the barrel shroud fitted.
Oh yes there is a difference. If you look carefully the barrel appears thinner in the second picture, 'cos it is. The shroud is a tapered sleeve that slides over the barrel and is held on by the foresight (and glue in my case, boy was that a bugger to shift).