This sight was for the Super 14 as a Metalic Silhouette barrel. I once purchased a 41 magnum barrel with one of these sights and found it to be very user friendly for adjustments. I've found over the years that the crotch of the rear sight was matched with the front blade, making them almost caliber specific. My super 14' had the front sight silver soldered in place so switching rear sights meant grinding or adding material to the front of the front sight it was going to be used on. The large hangun calibers like a 357 Max and Mag, 41, 44, and 45 Win Mag would almost certainly use the same sights. However, the 30-30, 7mmTCU, 6.5 TCU, 6mm TCU, 25 TCU, 30 and 357 Herrett would most likely use a different one. I've never seen these on 10" barrels, only the 14" and only in specific calibers. I pass these sights by all the time, I would much rather have a Williams peep than this Silhouette sight. Good Luck.