FYI for an update.

It's from a 1901 Krag Carbine. It's been modified with a Williams aperture. The gun was the workhorse in the Spanish / American War. The sight appears to be original equipment. I'm impressed with the craftsmanship of the era and it's cool to shooting with a sight well over 100 years old. I may have to try some long range stuff with this rifle.

I'm currently reading " Sharpshooting in the Civil War " and becoming inspired to stretch my distance.