I have the Uberti 1885 in 45-70 and found that a Marble's tang sight for the 1894 Winchester fit perfectly. Also, the deluxe long range tang sight for my C. Sharps 1875 fits. You might look at the ASSRA (American Single Shot Rifle Association) website. There is a discussion on one of the forums about tang sights for the Uberti. I did not change the front sight. If you intend to shoot out to 800 or 1000 yds you may want to get one of the taller tang sights. The Marble's now has a longer sight stem available but I get a little concerned about the Marble's hitting me in the eye on a heavy recoiling rifle. For a really good selection of sights check out Buffalo Arms website.