If you like more traditional looking sights, you can go with a semi-buckhorn rear and brass bead front sight. This approach is a natural for the carbine. Here is what I used on my 20" carbine. I really like this setup and I hope this information helps:
20” Carbine:
I got the Marble sights at Brownells:
• Front -Marble 45-MR 1/16" Gold Front Sight - Marbles p/n 504521, Brownells' p/n. 579-504-521WB
• Rear - Marble#64 Dovetail Semi-Buckhorn Rear, Short Shank- Brownells' p/n. 579-064-001
For the 24" rifle, you have the choice of barrel mounted sights or also the addition of a tang mounted sight with a fold down rear sight. I used the tang and fold down rear on my 24” Rifle.
Rossi Sights 24” Rifle:
I got the sights at Brownells:
• 1ea Marbles 45MR 1/16” Brass Bead front sight Marbles p/n 604521, Brownells' p/n. 579-604-521WB
• Rear - Marble Folding Sporting Rear Sight No. 95 - Brownells' p/n. 579-000-082 (you need a folding one so it doesn't block the tang)
• Tang - Marble Rossi 1892 Peep Tang Sight - Brownells' p/n. 579-009-807WB (made specifically for your Rossi '92)
• or Lyman No. 2 1892 Peep Tang Sight – Brownells' p/n. 539-050-002WB (Made for Winchester 1892s)
• Screws -Marble Peep Tang Sight Screw Set (Rossi) - Brownells' p/n. 579-000-101WB (Marbles p/n 995002, again, specifically for your Rossi '92)
Later, I removed the Marbles front sight and installed a Lyman Globe. It helped me with my 300yd shooting I do with my rifle.
• Front - Lyman Globe front sight model 17A - Brownells' p/n. 539-017-444WB (metric dovetail)
• 1ea Lee Shaver Insert Set for Lyman 17A combo card – Brownells' p/n. 781-100-017 (I use the small post)
Note: The Rossi rifles (both 20" short and 24" bbl) are already D&T for the front tang sight screw so all you have to do is screw them on. Use the existing front and rear sight to line the tang sight up, then remove the front sight and use the rear and tang to line the new one up. Finally, remove the rear sight and use the front and tang to line the folding new one up.