While we here use the generic term 'pistoleiro' for a gun man, we make a clear distinction when naming a 'revolver' or a 'pistola', as so technically different they are.
On the Buntline; once it has its barrel shortened, is no more a Buntline ... but a Buntshorty
They say that what Ned Buntline did, was no more that ordering five 1873 Colt Single Action Army revolvers, outfitted them with 12 inch barrels and clamp on wood butt stocks,
The classic Colt Army/Navy .44 caliber also has lugs for attaching a shoulder stock.
So what he actually did as new was ... stretch the barrel