I would bet there are/were more than ten "all up" sets as my 16GHE is a skeet/trap set and letters with all the extras, SST,BTF, VR and the GHE 12 was the set up the same way. Both sets of bbls have their own forarm. It would seem unlikely to me that I would have two of the ten. The GHE 20 was a field gun with 28 & 30 inch bbls, PG, splinter forarms and DT. I wish I had that one back