The Stock Master Xtreme is a top of the range Tanfoglio Stock for competition. Because it shares its frame with the other Stock models, it takes the same Toni System grip and reload parts and the same rear sights.
The Toni System mounts for Tanfoglio models name the Stock Master Xtreme directly. They take the rear sight's place, in two footprint letters, with an Outer Impact alternative alongside. See Red dot mounts for Tanfoglio Stock Master Xtreme.