I was totally familiar with the terms Mon-Block & Chopperlump. I have seen conflicting info on Demi-Block. Apparently from this thread the term has at various times & by Sundry makers been used for "Both" of the former.
The Stevens in question which was described as a Demi-Block is obviously not a chopperlump, with the steel block & damascus bbls. What I was not certain about was whether or not the block of the "Demi" was actually built in two pieces with a vertical seam through the center or not.
Perhaps Demi-Bloc was just a predecessor to the term Mono-Block.
Do we have any reference to the term Mono-Block prior to its use by Berreta. Although Pieper seems to have originated the concept he seems to have just mostly referred to it as his "Steel Breech Piece".
