)For the case of older, side-by-side, Spanish guns, the choke is often marked on the tang of the barrels, becoming exposed when the wooden forearm is removed, after the double barrels are pivoted off of the break-action, such as when performing a field-stripping and cleaning.The manufacturer's mark, along with the proof marks, and the weight of the barrels in grams, and the proof test pressures are also stamped alongside the choke marking on the tang of the barrels, near where the shells are inserted into the barrels.